240 Area Code: Location, Cities, Map And Time Zone

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Area code 240 is in Maryland, USA , spanning 11 counties and serving 181 cities , including Germantown, Rockville or Gaithersburg; it currently uses 785 prefixes , assigned from 240-200-XXXX through 240-998-XXXX.

In service since June 01, 1997, area code 240 is an overlay Numbering Plan Area, part of overlay complex 301/240/227.

The current local time is .

240 area code location on a map
© OpenStreetMap contributorsFor exact NPA boundaries see official 240 area code map

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More Maryland area codes:

  • 227
  • 301
  • 410
  • 443
  • 667

Locate any 240-NXX prefix:

240-200-XXXX --- 240-299-XXXX
NPANXX Carrier1 Area Served2 Date3
240-200 Bandwidth.com Clec Washington Zone 2 10/4/2010
240-201 Peerless Network Of Maryland Ridge N/A
240-202 Onvoy Highfield 5/28/2020
240-203 Omnipoint Communications Cap Operations Hagerstown 10/4/2011
240-204 Cellco Partnership Washington Zone 2 9/7/2011
240-205 New Cingular Wireless PCS Washington Zone 10 7/23/2003
240-206 MCIMetro Access Transmission Services Washington Zone 14 N/A
240-207 Paetec Itel Damascus N/A
240-208 Peerless Network Of Maryland La Plata N/A
240-209 Peerless Network Of Maryland Indian Head N/A
240-210 New Cingular Wireless PCS Waldorf N/A
240-212 Core Communications Oakland N/A
240-213 Peerless Network Of Maryland Waldorf N/A
240-214 Peerless Network Of Maryland Mechanicsville N/A
240-215 Level 3 Communications Frederick N/A
240-216 MetroPCS Waldorf 3/15/2001
240-217 Omnipoint Communications Cap Operations Hagerstown 4/16/2001
240-218 Peerless Network Of Maryland Nanjemoy N/A
240-219 Peerless Network Of Maryland Ridge 9/22/2014
240-220 Peerless Network Of Maryland Poolesville N/A
240-221 Verizon Maryland Washington Zone 11 N/A
240-222 Paetec Itel Waldorf N/A
240-223 MCIMetro Access Transmission Services Washington Zone 2 N/A
240-224 Cellco Partnership Gaithersburg 9/10/2012
240-225 Core Communications Frederick N/A
240-226 Onvoy Oakland 7/16/2020
240-227 New Cingular Wireless PCS Myersville 07/25/2023
240-228 Verizon Maryland Washington Zone 13 N/A
240-229 Level 3 Communications Waldorf N/A
240-230 Level 3 Communications Hughesville N/A
240-231 Core Communications Hagerstown N/A
240-232 Level 3 Communications Washington Zone 14 N/A
240-233 Teleport Communications America Tompkinsville N/A
240-234 Cellco Partnership Washington Zone 2 10/4/2011
240-235 Paetec Itel Washington Zone 2 N/A
240-236 Verizon Maryland Frederick N/A
240-237 Teleport Communications America Lexington Park-Great Mills N/A
240-238 Paetec Itel Washington Zone 10 N/A
240-239 Core Communications Leonardtown N/A
240-240 Fractel Damascus 7/2/2020
240-241 Starpower Communications Washington Zone 13 N/A
240-242 Starpower Communications Washington Zone 11 N/A
240-243 MCIMetro Access Transmission Services Gaithersburg N/A
240-244 Starpower Communications Washington Zone 16 N/A
240-245 Starpower Communications Washington Zone 14 N/A
240-246 Starpower Communications Gaithersburg N/A
240-247 MCIMetro Access Transmission Services Washington Zone 3 N/A
240-248 Peerless Network Of Maryland Ridge N/A
240-249 Teleport Communications America Mechanicsville N/A
240-250 Peerless Network Of Maryland Brandywine N/A
240-251 Core Communications Highfield N/A
240-252 Level 3 Communications Gaithersburg N/A
240-253 Bandwidth.com Clec Washington Zone 6 N/A
240-254 Teleport Communications America Hughesville N/A
240-255 Peerless Network Of Maryland Poolesville N/A
240-256 Teleport Communications America Leonardtown N/A
240-257 Teleport Communications America Nanjemoy N/A
240-258 Teleport Communications America Ridge N/A
240-259 Onvoy Spectrum Hughesville 4/22/2021
240-260 MCIMetro Access Transmission Services Washington Zone 14 N/A
240-261 Onvoy Gaithersburg 12/23/2015
240-262 Comcast IP Phone Lexington Park-Great Mills 10/17/2011
240-263 New Cingular Wireless PCS Washington Zone 2 11/10/2011
240-264 Verizon Maryland Laurel N/A
240-265 Omnipoint Communications Cap Operations Washington Zone 2 11/10/2011
240-266 Peerless Network Of Maryland Washington Zone 14 N/A
240-267 Cellco Partnership Hagerstown 5/18/2017
240-268 MCIMetro Access Transmission Services Washington Zone 10 N/A
240-269 Peerless Network Of Maryland Washington Zone 16 N/A
240-270 Cellco Partnership Waldorf 11/7/2011
240-271 New Cingular Wireless PCS Washington Zone 2 N/A
240-272 Omnipoint Communications Cap Operations Washington Zone 2 11/10/2011
240-273 Level 3 Communications Washington Zone 6 N/A
240-274 New Cingular Wireless PCS Washington Zone 2 N/A
240-275 Core Communications Grantsville N/A
240-276 Verizon Maryland Washington Zone 10 5/4/2004
240-277 Omnipoint Communications Cap Operations Washington Zone 2 10/18/2002
240-278 Cellco Partnership Laurel 7/8/2011
240-279 Core Communications Waldorf N/A
240-280 Comcast IP Phone Laurel N/A
240-281 New Cingular Wireless PCS Washington Zone 2 N/A
240-282 Peerless Network Of Maryland Mechanicsville N/A
240-283 Paetec Itel Washington Zone 11 N/A
240-284 Level 3 Communications Frostburg 11/1/2004
240-285 Cellco Partnership Frederick N/A
240-286 Omnipoint Communications Cap Operations Washington Zone 2 9/17/2002
240-287 Core Communications Hancock N/A
240-288 Comcast IP Phone Thurmont 11/1/2004
240-289 Paetec Itel Washington Zone 6 N/A
240-290 MCIMetro Access Transmission Services Washington Zone 11 N/A
240-291 New Cingular Wireless PCS Hagerstown 10/15/2002
240-292 Verizon Maryland Washington Zone 11 N/A
240-293 Starpower Communications Washington Zone 12 N/A
240-294 MCIMetro Access Transmission Services Laurel N/A
240-295 Paetec Itel Laurel N/A
240-296 Paetec Itel Washington Zone 4 N/A
240-297 Level 3 Communications Washington Zone 13 N/A
240-298 Cellco Partnership Leonardtown N/A
240-299 MetroPCS Waldorf N/A
240-300-XXXX --- 240-399-XXXX
NPANXX Carrier1 Area Served2 Date3
240-300 Cellco Partnership Waldorf 12/7/2010
240-301 Onvoy Clear Spg 6/9/2020
240-302 New Cingular Wireless PCS Laurel 9/28/2016
240-303 Paetec Itel Washington Zone 16 N/A
240-304 Omnipoint Communications Cap Operations Washington Zone 5 7/3/2002
240-305 Omnipoint Communications Cap Operations Washington Zone 3 N/A
240-306 MCIMetro Access Transmission Services Gaithersburg N/A
240-307 Bandwidth.com Clec Emmitsburg 3/27/2003
240-308 New Cingular Wireless PCS Damascus N/A
240-309 Cellco Partnership Leonardtown 9/10/2012
240-310 Uscoc Of Cumberland Hagerstown N/A
240-312 Paetec Itel Washington Zone 5 N/A
240-313 Verizon Maryland Hagerstown N/A
240-314 Verizon Maryland Washington Zone 10 N/A
240-315 Verizon Maryland Frederick N/A
240-316 Omnipoint Communications Cap Operations Washington Zone 2 N/A
240-317 Starpower Communications Lexington Park-Great Mills N/A
240-318 Verizon Maryland Washington Zone 16 N/A
240-319 Cellco Partnership Laurel 6/6/2008
240-320 Paetec Itel Waldorf N/A
240-321 Uscoc Of Cumberland Oakland N/A
240-322 Core Communications Mccoole N/A
240-323 Core Communications Emmitsburg N/A
240-324 Ymax Communications Corp. Ashton 10/8/2008
240-325 Core Communications Damascus N/A
240-326 Paetec Itel Washington Zone 15 N/A
240-327 Core Communications Gaithersburg N/A
240-328 Verizon Maryland Washington Zone 10 N/A
240-329 Level 3 Communications Hagerstown N/A
240-330 Omnipoint Communications Cap Operations Washington Zone 2 12/14/2007
240-331 Peerless Network Of Maryland Washington Zone 3 N/A
240-332 Peerless Network Of Maryland Tompkinsville N/A
240-333 Paetec Itel Washington Zone 2 5/9/2001
240-334 Level 3 Communications Washington Zone 14 N/A
240-335 Paetec Itel Washington Zone 14 N/A
240-336 Core Communications Washington Zone 2 N/A
240-337 Onvoy Washington Zone 5 N/A
240-338 Cellco Partnership Washington Zone 3 N/A
240-339 Paetec Itel Washington Zone 15 N/A
240-340 Omnipoint Communications Cap Operations Washington Zone 2 8/18/2011
240-341 MCIMetro Access Transmission Services Buckeyestown 2/25/2009
240-342 Starpower Communications Ashton N/A
240-343 Cellco Partnership Hancock 5/10/2011
240-344 New Cingular Wireless PCS Frederick 10/15/2002
240-345 Level 3 Communications Ashton 3/9/2006
240-346 MetroPCS Waldorf N/A
240-347 Bandwidth.com Clec Hagerstown 8/4/2008
240-348 Level 3 Communications Washington Zone 16 N/A
240-349 Onvoy La Plata N/A
240-350 Omnipoint Communications Cap Operations Washington Zone 3 N/A
240-351 Omnipoint Communications Cap Operations Washington Zone 3 N/A
240-352 Peerless Network Of Maryland La Plata N/A
240-353 Omnipoint Communications Cap Operations Washington Zone 3 N/A
240-354 Omnipoint Communications Cap Operations Washington Zone 3 N/A
240-355 Omnipoint Communications Cap Operations Washington Zone 3 N/A
240-356 Level 3 Communications Myersville N/A
240-357 Cellco Partnership Frederick 6/12/2006
240-358 Peerless Network Of Maryland Damascus N/A
240-359 Peerless Network Of Maryland Indian Head N/A
240-360 Omnipoint Communications Cap Operations Laurel 9/17/2013
240-361 Paetec Itel Gaithersburg N/A
240-362 Verizon Maryland Cumberland N/A
240-363 Onvoy Washington Zone 11 N/A
240-364 Paetec Itel Gaithersburg 5/9/2001
240-365 Baltimore-Washington Telephone (bwt) Damascus N/A
240-366 Bandwidth.com Clec Williamsport N/A
240-367 Omnipoint Communications Cap Operations Frederick 10/18/2002
240-368 Peerless Network Of Maryland Waldorf N/A
240-369 Core Communications Mount Airy N/A
240-370 Omnipoint Communications Cap Operations Washington Zone 2 12/14/2007
240-371 Peerless Network Of Maryland Washington Zone 12 N/A
240-372 MetroPCS Gaithersburg N/A
240-373 Verizon Maryland Washington Zone 13 N/A
240-374 Level 3 Communications Laurel N/A
240-375 Omnipoint Communications Cap Operations Washington Zone 5 N/A
240-376 Peerless Network Of Maryland Hughesville N/A
240-377 Level 3 Communications Indian Head N/A
240-378 Core Communications Cumberland N/A
240-379 Verizon Maryland Frederick N/A
240-380 Cellco Partnership Washington Zone 2 9/17/2007
240-381 New Cingular Wireless PCS Washington Zone 3 N/A
240-382 Teleport Communications America Hagerstown 6/11/2009
240-383 New Cingular Wireless PCS Washington Zone 2 N/A
240-384 Peerless Network Of Maryland Lexington Park-Great Mills N/A
240-385 Verizon Maryland Myersville N/A
240-386 Verizon Maryland Washington Zone 10 N/A
240-387 Paetec Itel Washington Zone 13 N/A
240-388 MetroPCS Gaithersburg 11/4/2002
240-389 Paetec Itel Ashton N/A
240-390 Paetec Itel Ashton N/A
240-391 Onvoy Washington Zone 13 N/A
240-392 Starpower Communications Washington Zone 5 N/A
240-393 Cellco Partnership Washington Zone 3 N/A
240-394 New Cingular Wireless PCS Mount Airy 12/13/2004
240-395 Paetec Itel Washington Zone 2 N/A
240-396 Level 3 Communications Washington Zone 2 N/A
240-397 Cellco Partnership Frederick 3/6/2009
240-398 Omnipoint Communications Cap Operations Washington Zone 3 7/3/2002
240-399 MCIMetro Access Transmission Services Washington Zone 10 N/A
240-400-XXXX --- 240-499-XXXX
NPANXX Carrier1 Area Served2 Date3
240-400 Omnipoint Communications Cap Operations Washington Zone 2 8/18/2011
240-401 New Cingular Wireless PCS Washington Zone 10 N/A
240-402 MCIMetro Access Transmission Services Washington Zone 13 9/21/2010
240-403 Paetec Itel Washington Zone 10 N/A
240-404 MCIMetro Access Transmission Services Gaithersburg 2/13/2001
240-405 Paetec Itel Frederick 7/27/2004
240-406 New Cingular Wireless PCS Washington Zone 10 9/17/2009
240-407 Level 3 Communications Washington Zone 16 N/A
240-408 New Cingular Wireless PCS Washington Zone 10 10/14/2009
240-409 New Cingular Wireless PCS Frederick N/A
240-410 Omnipoint Communications Cap Operations Cumberland 1/13/2021
240-412 MetroPCS Waldorf 1/16/2001
240-413 Omnipoint Communications Cap Operations Washington Zone 4 3/12/2001
240-414 Peerless Network Of Maryland Washington Zone 6 N/A
240-415 Ymax Communications Corp. Frederick 12/16/2008
240-416 New Cingular Wireless PCS Waldorf 5/18/2001
240-417 MetroPCS Washington Zone 5 N/A
240-418 Omnipoint Communications Cap Operations Washington Zone 2 11/12/2001
240-419 Cellco Partnership Waldorf 10/29/2007
240-420 Verizon Maryland Hagerstown N/A
240-421 Omnipoint Communications Cap Operations Washington Zone 10 4/9/2001
240-422 Omnipoint Communications Cap Operations Frederick 5/15/2002
240-423 Omnipoint Communications Cap Operations Washington Zone 3 5/21/2001
240-424 Omnipoint Communications Cap Operations Washington Zone 3 11/16/2007
240-425 Omnipoint Communications Cap Operations Washington Zone 2 N/A
240-426 Omnipoint Communications Cap Operations Washington Zone 2 10/25/2001
240-427 MCIMetro Access Transmission Services Waldorf 4/23/2001
240-428 Bandwidth.com Clec Washington Zone 10 N/A
240-429 Cellco Partnership Washington Zone 3 12/19/2006
240-430 Paetec Itel Washington Zone 11 N/A
240-431 Omnipoint Communications Cap Operations Lexington Park-Great Mills N/A
240-432 Omnipoint Communications Cap Operations Washington Zone 3 N/A
240-433 Paetec Itel Washington Zone 12 N/A
240-434 Level 3 Communications Leonardtown N/A
240-435 Cellco Partnership Waldorf 5/7/2009
240-436 Level 3 Communications Buckeyestown N/A
240-437 MCIMetro Access Transmission Services Ashton N/A
240-438 Omnipoint Communications Cap Operations Washington Zone 3 8/15/2011
240-439 Cellco Partnership Frederick 6/6/2008
240-440 New Cingular Wireless PCS Frederick 2/27/2009
240-441 Omnipoint Communications Cap Operations Washington Zone 6 6/6/2001
240-442 Verizon Maryland Oakland 5/22/2001
240-443 Onvoy Washington Zone 6 11/6/2020
240-444 Cellco Partnership Laurel 9/7/2011
240-445 Onvoy Washington Zone 2 11/10/2011
240-446 Cellco Partnership Frederick 8/9/2001
240-447 New Cingular Wireless PCS Washington Zone 10 N/A
240-448 Onvoy Waldorf 9/7/2011
240-449 New Cingular Wireless PCS Gaithersburg N/A
240-450 Paetec Itel Washington Zone 3 N/A
240-451 Onvoy Thurmont 9/2/2016
240-452 Lumos Networks Hagerstown 7/22/2010
240-453 Verizon Maryland Washington Zone 10 N/A
240-454 Paetec Itel Gaithersburg 4/22/2005
240-455 Paetec Itel Washington Zone 5 6/20/2001
240-456 Verizon Maryland Laurel N/A
240-457 Cellco Partnership Frederick 9/4/2008
240-458 Cellco Partnership Waldorf 10/4/2011
240-459 Cellco Partnership Laurel 7/27/2010
240-460 New Cingular Wireless PCS Washington Zone 3 N/A
240-461 New Cingular Wireless PCS Washington Zone 3 N/A
240-462 Omnipoint Communications Cap Operations Washington Zone 3 N/A
240-463 New Cingular Wireless PCS Washington Zone 3 N/A
240-464 Omnipoint Communications Cap Operations Washington Zone 2 N/A
240-465 Peerless Network Of Maryland Washington Zone 2 N/A
240-466 New Cingular Wireless PCS Mechanicsville 7/10/2001
240-467 Comcast IP Phone Washington Zone 4 4/25/2013
240-468 Omnipoint Communications Cap Operations Washington Zone 3 11/16/2007
240-469 Omnipoint Communications Cap Operations Hagerstown 2/14/2008
240-470 Cellco Partnership Laurel 10/4/2011
240-471 Onvoy Washington Zone 12 N/A
240-472 New Cingular Wireless PCS Washington Zone 3 N/A
240-473 Paetec Itel Washington Zone 13 N/A
240-474 Baltimore-Washington Telephone (bwt) Gaithersburg 5/22/2015
240-475 New Cingular Wireless PCS Washington Zone 3 N/A
240-476 Omnipoint Communications Cap Operations Washington Zone 3 2/21/2001
240-477 Paetec Itel Gaithersburg 5/20/2005
240-478 New Cingular Wireless PCS Washington Zone 3 7/27/2004
240-479 Cellco Partnership Washington Zone 2 4/7/2008
240-480 Omnipoint Communications Cap Operations Washington Zone 2 9/27/2010
240-481 Omnipoint Communications Cap Operations Washington Zone 3 5/11/2001
240-482 Paetec Itel Washington Zone 2 N/A
240-483 Comcast IP Phone Washington Zone 2 N/A
240-484 New Cingular Wireless PCS Laurel 6/12/2017
240-485 Paetec Itel Washington Zone 3 N/A
240-486 Omnipoint Communications Cap Operations Washington Zone 14 3/12/2001
240-487 Paetec Itel Washington Zone 4 N/A
240-488 Shentel Communications Oakland 5/16/2012
240-489 MCIMetro Access Transmission Services Poolesville 2/13/2001
240-490 Omnipoint Communications Cap Operations Middletown 6/12/2001
240-491 Level 3 Communications Washington Zone 3 N/A
240-492 Paetec Itel Washington Zone 5 N/A
240-493 Paetec Itel Washington Zone 6 N/A
240-494 Paetec Itel Washington Zone 3 5/9/2001
240-495 Cellco Partnership Washington Zone 4 10/29/2013
240-496 Cellco Partnership Leonardtown 3/17/2016
240-497 Verizon Maryland Washington Zone 2 N/A
240-498 Omnipoint Communications Cap Operations Washington Zone 2 N/A
240-499 Paetec Itel Washington Zone 10 N/A
240-500-XXXX --- 240-599-XXXX
NPANXX Carrier1 Area Served2 Date3
240-500 Paetec Itel Hagerstown 10/21/2010
240-501 Omnipoint Communications Cap Operations Washington Zone 3 10/8/2001
240-502 Bandwidth.com Clec Washington Zone 3 10/4/2011
240-503 Peerless Network Of Maryland Tompkinsville 4/9/2013
240-504 Omnipoint Communications Cap Operations Washington Zone 3 10/4/2011
240-505 Omnipoint Communications Cap Operations Washington Zone 3 10/31/2001
240-506 New Cingular Wireless PCS Washington Zone 10 1/9/2002
240-507 Cellco Partnership Washington Zone 2 9/5/2008
240-508 MetroPCS Washington Zone 5 N/A
240-509 Bandwidth.com Clec Washington Zone 14 3/31/2008
240-510 MCIMetro Access Transmission Services Washington Zone 15 N/A
240-512 Core Communications Washington Zone 13 8/8/2006
240-513 Omnipoint Communications Cap Operations Hagerstown 10/19/2011
240-514 Paetec Itel Washington Zone 11 N/A
240-515 New Cingular Wireless PCS Washington Zone 2 6/20/2001
240-516 Paetec Itel Washington Zone 12 N/A
240-517 Cellco Partnership Laurel 10/28/2014
240-518 Nuso Waldorf 10/21/2011
240-519 New Cingular Wireless PCS Washington Zone 2 11/10/2011
240-520 Omnipoint Communications Cap Operations Hagerstown 3/29/2006
240-521 New Cingular Wireless PCS Laurel 1/11/2018
240-522 MetroPCS Cumberland 12/12/2001
240-523 MCIMetro Access Transmission Services La Plata 2/13/2001
240-524 Peerless Network Of Maryland Laurel N/A
240-525 Peerless Network Of Maryland Washington Zone 15 N/A
240-526 Peerless Network Of Maryland Leonardtown N/A
240-527 Verizon Maryland Hagerstown N/A
240-528 Level 3 Communications Hughesville N/A
240-529 Verizon Maryland Frederick N/A
240-530 Core Communications Waldorf 8/1/2013
240-531 Telnyx Washington Zone 3 3/7/2017
240-532 Cellco Partnership Washington Zone 5 10/29/2013
240-533 Teleport Communications America Washington Zone 3 N/A
240-534 Cellco Partnership Washington Zone 2 4/11/2016
240-535 New Cingular Wireless PCS Washington Zone 3 1/9/2001
240-536 Peerless Network Of Maryland Ashton N/A
240-537 Atlantech Online Hagerstown 9/15/2017
240-538 MCIMetro Access Transmission Services Leonardtown 2/13/2001
240-539 Peerless Network Of Maryland Washington Zone 4 N/A
240-540 The Voice Application Network Washington Zone 13 10/5/2016
240-541 New Cingular Wireless PCS Washington Zone 2 10/31/2011
240-542 Paetec Itel Washington Zone 13 N/A
240-543 Omnipoint Communications Cap Operations Washington Zone 2 7/25/2006
240-544 Paetec Itel Washington Zone 14 N/A
240-545 Paetec Itel Washington Zone 15 N/A
240-546 Paetec Itel Washington Zone 16 N/A
240-547 Level 3 Communications Laurel N/A
240-548 Core Communications Washington Zone 14 N/A
240-549 Cellco Partnership Frederick 3/17/2016
240-550 New Cingular Wireless PCS Washington Zone 10 3/26/2009
240-551 New Cingular Wireless PCS Washington Zone 10 3/25/2009
240-552 New Cingular Wireless PCS Washington Zone 10 3/25/2009
240-553 MCIMetro Access Transmission Services Washington Zone 13 N/A
240-554 MCIMetro Access Transmission Services Laurel N/A
240-556 Paetec Itel Washington Zone 14 N/A
240-557 Omnipoint Communications Cap Operations Washington Zone 6 3/14/2017
240-558 Paetec Itel Washington Zone 11 N/A
240-559 MCIMetro Access Transmission Services Ashton N/A
240-560 MCIMetro Access Transmission Services Washington Zone 12 4/23/2001
240-561 Cellco Partnership Leonardtown 7/7/2008
240-562 MCIMetro Access Transmission Services Gaithersburg 6/12/2015
240-563 Onvoy Washington Zone 5 7/5/2017
240-564 Omnipoint Communications Cap Operations Laurel 12/21/2018
240-565 Omnipoint Communications Cap Operations Laurel 12/30/2005
240-566 Verizon Maryland Frederick 6/11/2002
240-567 Verizon Maryland Washington Zone 10 7/12/2006
240-568 Verizon Maryland Laurel N/A
240-569 Bandwidth.com Clec Flintstone 9/22/2017
240-570 Onvoy Ashton 2/24/2016
240-571 Cellco Partnership Laurel 1/14/2021
240-572 Cellco Partnership Leonardtown 11/15/2017
240-573 Level 3 Communications Washington Zone 15 N/A
240-574 New Cingular Wireless PCS Friendsville 8/27/2020
240-575 Level 3 Communications Frederick 12/30/2005
240-576 Vonage America Hagerstown 12/20/2017
240-577 Cellco Partnership Leonardtown 8/9/2006
240-578 Cellco Partnership Frederick 7/8/2011
240-579 Omnipoint Communications Cap Operations Ashton 1/11/2018
240-580 Omnipoint Communications Cap Operations Cumberland 6/14/2001
240-581 Paetec Itel Laurel N/A
240-582 Verizon Maryland Washington Zone 4 N/A
240-583 Verizon Maryland Laurel 4/28/2010
240-584 Omnipoint Communications Cap Operations Laurel 1/11/2018
240-585 Cellco Partnership Waldorf 6/29/2011
240-586 Verizon Maryland Frederick 12/22/2006
240-587 Cellco Partnership Leonardtown 7/6/2009
240-588 MCIMetro Access Transmission Services Grantsville 2/1/2018
240-589 New Cingular Wireless PCS Mccoole 3/7/2018
240-590 MetroPCS Washington Zone 12 4/9/2018
240-591 Shentel Communications Hagerstown 4/17/2018
240-592 Verizon Maryland Washington Zone 13 7/1/2016
240-593 Omnipoint Communications Cap Operations Laurel 3/13/2001
240-594 Bandwidth.com Clec Bittinger 5/15/2018
240-595 Cellco Partnership Washington Zone 3 9/13/2006
240-596 Core Communications Ashton 6/11/2018
240-597 Peerless Network Of Maryland Gaithersburg N/A
240-598 Core Communications Hughesville 6/11/2018
240-599 Level 3 Communications Washington Zone 10 N/A
240-600-XXXX --- 240-699-XXXX
NPANXX Carrier1 Area Served2 Date3
240-600 Omnipoint Communications Cap Operations Washington Zone 2 4/27/2011
240-601 Omnipoint Communications Cap Operations Washington Zone 3 N/A
240-602 Omnipoint Communications Cap Operations Washington Zone 3 N/A
240-603 Omnipoint Communications Cap Operations Washington Zone 3 N/A
240-604 Omnipoint Communications Cap Operations Washington Zone 3 N/A
240-605 Omnipoint Communications Cap Operations Washington Zone 3 N/A
240-606 Omnipoint Communications Cap Operations Washington Zone 3 N/A
240-607 Level 3 Communications Waldorf N/A
240-608 Nuso Frederick 3/11/2013
240-609 New Cingular Wireless PCS Cumberland 9/11/2014
240-610 Core Communications Washington Zone 4 6/11/2018
240-612 Level 3 Telecom Of Maryland Washington Zone 5 N/A
240-613 Paetec Itel Washington Zone 4 4/5/2012
240-614 MetroPCS Washington Zone 10 7/16/2013
240-615 MetroPCS Washington Zone 4 5/29/2013
240-616 MCIMetro Access Transmission Services Washington Zone 13 N/A
240-617 Bandwidth.com Clec Highfield 7/16/2015
240-618 Cellco Partnership Washington Zone 10 10/7/2014
240-619 Comcast IP Phone Washington Zone 5 N/A
240-620 MCIMetro Access Transmission Services Washington Zone 10 N/A
240-621 Bandwidth.com Clec Washington Zone 11 N/A
240-622 Core Communications La Plata 6/11/2018
240-623 Bandwidth.com Clec Washington Zone 4 12/8/2014
240-624 Verizon Maryland Washington Zone 13 N/A
240-625 MetroPCS Hagerstown 4/17/2001
240-626 Omnipoint Communications Cap Operations Frederick N/A
240-627 Level 3 Communications Washington Zone 11 N/A
240-628 Core Communications Mechanicsville 6/11/2018
240-629 Verizon Maryland Frederick N/A
240-630 Bandwidth.com Clec Washington Zone 2 10/31/2011
240-631 Verizon Maryland Gaithersburg N/A
240-632 Verizon Maryland Gaithersburg N/A
240-633 Baltimore-Washington Telephone (bwt) Hughesville 5/22/2015
240-634 Core Communications Ridge 6/11/2018
240-635 Core Communications Tompkinsville 6/11/2018
240-636 Omnipoint Communications Cap Operations Laurel N/A
240-637 Core Communications Washington Zone 3 6/11/2018
240-638 Level 3 Communications Washington Zone 3 N/A
240-639 Core Communications Laurel 6/1/2018
240-640 New Cingular Wireless PCS Waldorf 3/24/2009
240-641 Peerless Network Of Maryland Washington Zone 3 N/A
240-642 Advanced Telecom Solutions Washington Zone 10 8/2/2018
240-643 Omnipoint Communications Cap Operations Washington Zone 3 5/16/2002
240-644 MCIMetro Access Transmission Services Washington Zone 2 N/A
240-645 MCIMetro Access Transmission Services Washington Zone 3 N/A
240-646 Paetec Itel Laurel N/A
240-647 Core Communications Clear Spg 6/11/2018
240-648 Core Communications Keedysville 6/12/2018
240-649 Core Communications Smithsburg 6/12/2018
240-650 Onvoy Washington Zone 3 11/17/2011
240-651 Cellco Partnership Frederick N/A
240-652 MCIMetro Access Transmission Services Mechanicsville 2/13/2001
240-653 Peerless Network Of Maryland Laurel N/A
240-654 New Cingular Wireless PCS Gaithersburg 5/19/2006
240-655 Onvoy Kitzmiller 12/18/2017
240-656 New Cingular Wireless PCS Frederick 8/30/2019
240-657 MCIMetro Access Transmission Services Frostburg 1/6/2016
240-658 Vonage America Gaithersburg 12/4/2018
240-659 Omnipoint Communications Cap Operations Ashton 1/30/2019
240-660 Cellco Partnership Washington Zone 10 3/31/2015
240-661 Baltimore-Washington Telephone (bwt) Lexington Park-Great Mills 5/21/2015
240-662 Verizon Maryland Washington Zone 3 N/A
240-663 Omnipoint Communications Cap Operations Middletown 1/30/2019
240-664 Peerless Network Of Maryland Cumberland 3/6/2019
240-665 Omnipoint Communications Cap Operations Washington Zone 10 1/9/2017
240-666 Onvoy Nanjemoy 6/25/2015
240-667 Level 3 Communications Washington Zone 4 N/A
240-668 Starpower Communications Damascus N/A
240-669 Comcast IP Phone Washington Zone 11 N/A
240-670 Bandwidth.com Clec Washington Zone 3 3/6/2012
240-671 Omnipoint Communications Cap Operations Washington Zone 2 N/A
240-672 Cellco Partnership Washington Zone 10 N/A
240-673 Bandwidth.com Clec Washington Zone 2 5/17/2019
240-674 MetroPCS Frederick N/A
240-675 New Cingular Wireless PCS Myersville N/A
240-676 Cellco Partnership Washington Zone 3 N/A
240-677 MCIMetro Access Transmission Services Washington Zone 5 5/20/2019
240-678 Cellco Partnership Washington Zone 3 N/A
240-679 Core Communications Friendsville 6/11/2018
240-680 Peerless Network Of Maryland Frederick 10/29/2018
240-681 Paetec Itel Brandywine 10/30/2003
240-682 Starpower Communications Waldorf N/A
240-683 Verizon Maryland Gaithersburg N/A
240-684 Verizon Maryland Washington Zone 13 N/A
240-685 Level 3 Communications Brandywine N/A
240-686 Verizon Maryland Gaithersburg N/A
240-687 Cellco Partnership Washington Zone 3 N/A
240-688 Cellco Partnership Washington Zone 3 6/12/2006
240-689 Csc Wireless Washington Zone 15 5/28/2019
240-690 Teleport Communications America Gaithersburg 11/10/2016
240-691 Level 3 Communications Washington Zone 5 N/A
240-692 Level 3 Communications Grantsville 5/30/2019
240-693 Peerless Network Of Maryland Walkersville 9/25/2019
240-694 Verizon Maryland Washington Zone 2 N/A
240-695 Verizon Maryland Washington Zone 5 N/A
240-696 Level 3 Communications Washington Zone 4 N/A
240-697 Coretel Maryland Mechanicsville 9/12/2019
240-698 Omnipoint Communications Cap Operations Myersville 10/15/2019
240-699 Verizon Maryland Buckeyestown 5/22/2001
240-701-XXXX --- 240-799-XXXX
NPANXX Carrier1 Area Served2 Date3
240-701 New Cingular Wireless PCS Washington Zone 3 3/25/2009
240-702 Cellco Partnership Gaithersburg 10/7/2014
240-703 Omnipoint Communications Cap Operations Ashton 2/10/2021
240-704 New Cingular Wireless PCS Washington Zone 3 3/25/2009
240-705 New Cingular Wireless PCS Washington Zone 3 3/25/2009
240-706 New Cingular Wireless PCS Washington Zone 3 3/26/2009
240-707 New Cingular Wireless PCS Hagerstown 1/27/2012
240-708 Level 3 Communications Laurel 6/8/2012
240-709 Omnipoint Communications Cap Operations Laurel 10/25/2019
240-710 MCIMetro Access Transmission Services Frederick 12/30/2019
240-712 Cellco Partnership Laurel 11/1/2011
240-713 Peerless Network Of Maryland Laurel 11/2/2011
240-714 Omnipoint Communications Cap Operations Washington Zone 4 2/20/2015
240-715 Level 3 Communications Washington Zone 10 N/A
240-716 Omnipoint Communications Cap Operations Washington Zone 5 11/15/2013
240-717 Onvoy Spectrum Leonardtown 4/22/2021
240-718 MCIMetro Access Transmission Services Lexington Park-Great Mills 2/13/2001
240-719 Cellco Partnership Washington Zone 5 4/11/2016
240-720 Level 3 Communications Gaithersburg N/A
240-721 Verizon Maryland Washington Zone 5 3/19/2020
240-722 Omnipoint Communications Cap Operations Ashton N/A
240-723 Cellco Partnership Washington Zone 3 N/A
240-724 Paetec Itel Washington Zone 6 N/A
240-725 Verizon Maryland Lexington Park-Great Mills N/A
240-726 Nuso Washington Zone 4 9/1/2020
240-727 New Cingular Wireless PCS Cumberland N/A
240-728 Vonage America Washington Zone 10 5/12/2020
240-729 Omnipoint Communications Cap Operations Ashton 6/16/2020
240-730 HD Carrier Hagerstown 8/12/2020
240-731 New Cingular Wireless PCS Washington Zone 10 N/A
240-732 New Cingular Wireless PCS Mount Airy 11/12/2015
240-733 Fractel Ashton 7/15/2020
240-734 Bandwidth.com Clec Smithsburg 3/22/2012
240-735 Nuso Brunswick 9/1/2020
240-736 New Cingular Wireless PCS Laurel 9/2/2020
240-737 Paetec Itel Washington Zone 4 5/9/2001
240-738 Cellco Partnership Hancock 9/3/2020
240-739 Ip Horizon Frederick 9/15/2020
240-740 Atlantech Online Washington Zone 10 9/3/2015
240-741 Airespring Frederick 10/1/2020
240-742 Nuso Washington Zone 14 11/20/2020
240-743 Cellco Partnership Washington Zone 2 11/16/2006
240-744 Level 3 Communications Washington Zone 2 N/A
240-745 MCIMetro Access Transmission Services Damascus N/A
240-746 AT&T Brandywine 12/4/2020
240-747 Paetec Itel Washington Zone 11 5/9/2001
240-748 Teleport Communications America Washington Zone 3 12/23/2020
240-749 Cellco Partnership Laurel 1/12/2021
240-750 New Cingular Wireless PCS Gaithersburg 5/6/2005
240-751 Level 3 Communications Gaithersburg N/A
240-752 Level 3 Communications Washington Zone 2 N/A
240-753 Level 3 Communications Washington Zone 10 N/A
240-754 Level 3 Communications Waldorf 11/11/2011
240-755 Comcast IP Phone Laurel 1/5/2006
240-756 Omnipoint Communications Cap Operations Washington Zone 10 2/10/2021
240-757 Peerless Network Of Maryland Washington Zone 13 N/A
240-758 New Cingular Wireless PCS Laurel 3/3/2016
240-759 Onvoy Washington Zone 15 3/25/2021
240-760 Cellco Partnership Washington Zone 2 9/22/2015
240-761 New Cingular Wireless PCS Laurel 7/20/2021
240-762 Cellco Partnership Washington Zone 2 8/22/2012
240-763 Bandwidth.com Clec Washington Zone 15 10/1/2015
240-764 MCIMetro Access Transmission Services Washington Zone 4 N/A
240-765 MCIMetro Access Transmission Services Washington Zone 5 N/A
240-766 MCIMetro Access Transmission Services Washington Zone 6 N/A
240-767 Paetec Itel Washington Zone 5 5/9/2001
240-768 Onvoy Spectrum Nanjemoy 4/22/2021
240-769 Bandwidth.com Clec Keedysville 7/20/2021
240-770 Comcast IP Phone Washington Zone 4 11/22/2004
240-771 Onvoy Poolesville 2/18/2016
240-772 Cellco Partnership Frederick 11/17/2011
240-773 Verizon Maryland Washington Zone 10 N/A
240-774 Bandwidth.com Clec Lonaconing 10/5/2015
240-775 Bandwidth.com Clec Westernport 10/5/2015
240-776 Level 3 Communications La Plata N/A
240-777 Verizon Maryland Washington Zone 10 N/A
240-778 MCIMetro Access Transmission Services Washington Zone 10 N/A
240-779 Paetec Itel Ashton N/A
240-780 Level 3 Communications Gaithersburg N/A
240-781 MCIMetro Access Transmission Services Washington Zone 2 8/18/2015
240-782 Onvoy Damascus N/A
240-783 Mte Washington Zone 2 N/A
240-784 Omnipoint Communications Cap Operations Myersville 6/6/2001
240-785 Bandwidth.com Clec Oakland 7/20/2021
240-786 Level 3 Communications Laurel N/A
240-787 Level 3 Communications Brandywine N/A
240-788 Level 3 Communications Washington Zone 5 N/A
240-789 Advanced Telecom Solutions Washington Zone 10 8/10/2021
240-790 Level 3 Communications Washington Zone 13 N/A
240-791 Omnipoint Communications Cap Operations Washington Zone 4 8/11/2021
240-792 Omnipoint Communications Cap Operations Frederick 8/11/2021
240-793 MetroPCS Gaithersburg 3/15/2001
240-794 Level 3 Communications Lexington Park-Great Mills N/A
240-795 Cellco Partnership Washington Zone 5 8/12/2021
240-796 Omnipoint Communications Cap Operations Washington Zone 10 8/25/2021
240-797 Omnipoint Communications Cap Operations Ashton 8/25/2021
240-798 Onvoy Gaithersburg 9/1/2021
240-799 Fractel Brandywine 6/26/2020
240-800-XXXX --- 240-899-XXXX
NPANXX Carrier1 Area Served2 Date3
240-800 Core Communications Washington Zone 2 6/22/2012
240-801 Cellco Partnership Gaithersburg 10/4/2013
240-802 Nuso Washington Zone 2 5/10/2013
240-803 New Cingular Wireless PCS Cumberland 1/27/2012
240-804 Onvoy Tompkinsville 4/23/2001
240-805 Cellco Partnership Gaithersburg 11/17/2015
240-806 Peerless Network Of Maryland Indian Head 9/30/2015
240-807 Uscoc Of Cumberland Cumberland 9/1/2021
240-808 Cellco Partnership Leonardtown 3/31/2015
240-809 Onvoy Smithsburg 9/1/2021
240-810 Omnipoint Communications Cap Operations Washington Zone 10 4/5/2016
240-812 Level 3 Communications Poolesville N/A
240-813 Paetec Itel Gaithersburg N/A
240-814 Cellco Partnership Laurel 5/20/2022
240-815 Cellco Partnership Frederick 11/17/2015
240-816 Bandwidth.com Clec Keedysville 10/5/2015
240-817 Omnipoint Communications Cap Operations Ashton 1/12/2016
240-818 Cellco Partnership Myersville N/A
240-819 Onvoy Williamsport 9/1/2021
240-820 Onvoy Ashton 3/25/2021
240-821 Paetec Itel Washington Zone 3 5/27/2005
240-822 Onvoy New Market 3/15/2021
240-823 MCIMetro Access Transmission Services Brandywine 2/13/2001
240-824 Onvoy Frostburg 3/15/2021
240-825 Cellco Partnership Washington Zone 4 3/17/2016
240-826 Verizon Maryland Washington Zone 10 5/7/2007
240-827 Onvoy Lonaconing 9/1/2021
240-828 Telnyx Washington Zone 4 N/A
240-829 Coretel Maryland Emmitsburg 9/12/2019
240-830 Comcast IP Phone Washington Zone 5 11/10/2015
240-831 Onvoy Frederick 4/26/2016
240-832 Omnipoint Communications Cap Operations Washington Zone 2 N/A
240-833 MCIMetro Access Transmission Services Washington Zone 11 N/A
240-834 Onvoy Kitzmiller 3/15/2021
240-835 Onvoy Spectrum Clear Spg 6/3/2021
240-836 Onvoy Mt Savage 9/1/2021
240-837 MCIMetro Access Transmission Services Hughesville 2/13/2001
240-838 Omnipoint Communications Cap Operations Washington Zone 5 3/12/2001
240-839 Cellco Partnership Washington Zone 3 1/13/2007
240-840 Onvoy Spectrum Frederick 6/19/2018
240-841 MCIMetro Access Transmission Services Laurel N/A
240-842 MCIMetro Access Transmission Services Washington Zone 14 N/A
240-843 MCIMetro Access Transmission Services Washington Zone 13 N/A
240-844 Onvoy Ridge 2/13/2001
240-845 MCIMetro Access Transmission Services Washington Zone 13 N/A
240-846 MCIMetro Access Transmission Services Washington Zone 16 N/A
240-847 Onvoy Washington Zone 3 12/9/2015
240-848 MetroPCS Gaithersburg N/A
240-849 Teleport Communications America Hagerstown 9/8/2021
240-850 Peerless Network Of Maryland Hagerstown 5/25/2016
240-851 Onvoy Mccoole 7/16/2020
240-852 Omnipoint Communications Cap Operations Myersville 9/13/2021
240-853 Bandwidth.com Clec Laurel 9/28/2021
240-854 Omnipoint Communications Cap Operations Washington Zone 4 12/7/2021
240-855 Omnipoint Communications Cap Operations Washington Zone 2 10/9/2006
240-856 Cellco Partnership Laurel 4/11/2016
240-857 Level 3 Telecom Of Maryland Washington Zone 5 N/A
240-858 Cellco Partnership Washington Zone 2 7/12/2016
240-859 Onvoy Ashton 7/11/2016
240-860 Peerless Network Of Maryland Cumberland 8/23/2016
240-861 Omnipoint Communications Cap Operations Ashton 10/7/2021
240-862 Onvoy Mt Savage 9/2/2016
240-863 Level 3 Telecom Of Maryland Washington Zone 3 N/A
240-864 Paetec Itel Washington Zone 10 5/9/2001
240-865 Level 3 Communications Washington Zone 14 N/A
240-866 Terra Nova Telecom Hagerstown 9/20/2019
240-867 Commio Washington Zone 3 6/20/2017
240-868 Paetec Itel Washington Zone 12 5/9/2001
240-869 Omnipoint Communications Cap Operations Washington Zone 10 10/7/2021
240-870 Onvoy Middletown 9/2/2016
240-871 Omnipoint Communications Cap Operations Lexington Park-Great Mills 10/7/2021
240-872 Omnipoint Communications Cap Operations Washington Zone 6 10/7/2021
240-873 Onvoy Buckeyestown 10/10/2019
240-874 Onvoy Thurmont 10/10/2019
240-875 Onvoy Mount Airy 10/10/2019
240-876 Omnipoint Communications Cap Operations Washington Zone 2 N/A
240-877 Onvoy Frederick 8/25/2016
240-878 Commio Hagerstown 8/3/2017
240-879 Omnipoint Communications Cap Operations Washington Zone 4 10/7/2021
240-880 Level 3 Communications Washington Zone 11 N/A
240-881 Bandwidth.com Clec Washington Zone 13 11/4/2021
240-882 MetroPCS Washington Zone 5 N/A
240-883 Level 3 Communications Ashton N/A
240-884 Onvoy Spectrum Tompkinsville 4/29/2021
240-885 Onvoy Washington Zone 10 1/21/2021
240-886 Omnipoint Communications Cap Operations Washington Zone 4 11/17/2021
240-887 Omnipoint Communications Cap Operations Ashton 12/7/2021
240-888 New Cingular Wireless PCS Washington Zone 10 N/A
240-889 Omnipoint Communications Cap Operations Washington Zone 10 12/6/2021
240-890 Cellco Partnership Washington Zone 5 12/7/2021
240-891 Level 3 Communications Damascus 12/10/2021
240-892 Level 3 Communications Washington Zone 15 N/A
240-893 New Cingular Wireless PCS Washington Zone 3 N/A
240-894 Dish Wireless Lexington Park-Great Mills 12/10/2021
240-895 Verizon Maryland Lexington Park-Great Mills N/A
240-896 Dish Wireless Hagerstown 12/28/2021
240-897 Level 3 Communications Washington Zone 16 N/A
240-898 Level 3 Communications Washington Zone 4 N/A
240-899 Omnipoint Communications Cap Operations Washington Zone 2 3/13/2001
240-900-XXXX --- 240-998-XXXX
NPANXX Carrier1 Area Served2 Date3
240-900 Onvoy Washington Zone 4 2/18/2015
240-901 Centurylink Communications La Plata 5/22/2014
240-902 Twilio International Damascus 12/28/2021
240-903 Comcast IP Phone Indian Head 12/3/2013
240-904 Cellco Partnership Laurel 6/23/2016
240-905 MetroPCS Brandywine 1/10/2022
240-906 Omnipoint Communications Cap Operations Washington Zone 4 N/A
240-907 Cellco Partnership Washington Zone 10 7/12/2016
240-908 Onvoy Walkersville 9/2/2016
240-909 MetroPCS Laurel 1/11/2022
240-910 Onvoy Frederick 3/3/2021
240-912 Paetec Itel Gaithersburg N/A
240-913 Onvoy Damascus 9/2/2016
240-914 Dish Wireless Highfield 1/11/2022
240-915 Telnyx New Market N/A
240-916 Omnipoint Communications Cap Operations Cumberland 1/11/2022
240-917 New Cingular Wireless PCS Laurel 11/12/2015
240-918 Omnipoint Communications Cap Operations Ashton 10/20/2016
240-919 Omnipoint Communications Cap Operations Ashton 1/26/2022
240-920 Level 3 Communications Cumberland 5/3/2001
240-921 Omnipoint Communications Cap Operations Washington Zone 10 1/26/2022
240-922 Fractel Washington Zone 11 7/15/2020
240-923 Omnipoint Communications Cap Operations Washington Zone 6 1/26/2022
240-924 Bandwidth.com Clec Mount Airy 2/10/2022
240-925 Cellco Partnership Leonardtown 8/9/2001
240-926 Omnipoint Communications Cap Operations Hughesville 5/18/2022
240-927 Omnipoint Communications Cap Operations Washington Zone 4 5/18/2022
240-928 New Cingular Wireless PCS Myersville 5/26/2022
240-929 Paetec Itel Washington Zone 14 N/A
240-930 Cellco Partnership Laurel 6/29/2022
240-931 Nuso Frederick 6/30/2022
240-932 Bandwidth.com Clec Washington Zone 14 6/30/2022
240-933 Ton80 Communications Buckeyestown 2/28/2022
240-934 Ton80 Communications Middletown 2/12/2021
240-935 Cellco Partnership Laurel 7/12/2022
240-936 Omnipoint Communications Cap Operations Ashton 5/18/2022
240-937 Bandwidth.com Clec Gaithersburg 7/22/2022
240-938 Omnipoint Communications Cap Operations Ashton 6/6/2001
240-939 Bandwidth.com Clec Washington Zone 11 7/26/2022
240-940 Bandwidth.com Clec Washington Zone 4 7/26/2022
240-941 Bandwidth.com Clec Washington Zone 2 8/3/2022
240-942 Onvoy Bittinger 3/15/2021
240-943 Comcast IP Phone Frostburg 8/5/2022
240-944 Onvoy Westernport 3/15/2021
240-945 Onvoy Washington Zone 3 11/6/2020
240-946 Fractel Washington Zone 14 10/25/2021
240-947 New Cingular Wireless PCS Myersville 8/16/2022
240-948 Bandwidth.com Clec Leonardtown 8/25/2022
240-949 Paetec Itel Washington Zone 16 5/9/2001
240-951 Teleport Communications America Hagerstown 3/24/2022
240-952 Teleport Communications America Hagerstown 3/24/2022
240-953 Teleport Communications America Hagerstown 3/24/2022
240-954 Teleport Communications America Hagerstown 3/24/2022
240-955 Bandwidth.com Clec La Plata 8/25/2022
240-956 Onvoy Washington Zone 2 11/6/2020
240-957 Bandwidth.com Clec Damascus 8/25/2022
240-960 Omnipoint Communications Cap Operations Washington Zone 4 9/1/2022
240-961 Cellco Partnership Poolesville 9/22/2022
240-962 Cellco Partnership Laurel 10/6/2022
240-963 Bandwidth.com Clec Washington Zone 03 10/18/2022
240-964 Verizon Maryland Cumberland 5/27/2008
240-965 Paetec Itel Washington Zone 13 N/A
240-966 Ton80 Communications Washington Zone 16 2/25/2022
240-967 Cellco Partnership Cumberland 10/19/2022
240-968 New Cingular Wireless PCS Laurel 10/21/2022
240-969 Commio Walkersville 11/7/2022
240-970 Onvoy Washington Zone 12 6/2/2015
240-971 Centurylink Communications Frederick 8/2/2016
240-972 Baltimore-Washington Telephone (bwt) Laurel 5/26/2015
240-973 MetroPCS Washington Zone 12 12/1/2022
240-974 New Cingular Wireless PCS Washington Zone 10 12/21/2022
240-975 Cellco Partnership Laurel 12/30/2022
240-977 Onvoy Washington Zone 6 02/22/2023
240-978 Omnipoint Communications Cap Operations Ashton 01/06/2023
240-979 Level 3 Communications Cumberland N/A
240-980 Cellco Partnership Leonardtown 01/09/2023
240-981 Nuso Gaithersburg 02/10/2023
240-982 Onvoy Gaithersburg 01/13/2023
240-983 Nuso Hagerstown 02/10/2023
240-984 Teleport Communications America New Market 02/27/2023
240-985 Centurylink Communications Williamsport 10/17/2016
240-986 Onvoy Nanjemoy 2/13/2001
240-987 New Cingular Wireless PCS Washington Zone 10 04/05/2023
240-988 Omnipoint Communications Cap Operations Washington Zone 3 N/A
240-989 New Cingular Wireless PCS Myersville 04/20/2023
240-990 New Cingular Wireless PCS Laurel 05/03/2023
240-991 Omnipoint Communications Cap Operations Ashton 05/05/2023
240-992 Omnipoint Communications Cap Operations Washington Zone 10 05/05/2023
240-993 MCIMetro Access Transmission Services Indian Head 2/13/2001
240-994 Cellco Partnership Washington Zone 10 N/A
240-995 Onvoy Flintstone 5/8/2020
240-996 Level 3 Communications Brunswick 10/17/2016
240-997 Cellco Partnership Washington Zone 3 N/A
240-998 Centurylink Communications Hancock 10/17/2016
  1. NPA-NXX assigned carrier; with Number Pooling thousand block numbers are often assigned to other carriers as well; moreover, phone numbers can be ported between service providers
  2. For 'Area served' we list the rate center. In the North American Numbering Plan a rate center is a geographic area used to determine local calling boundaries for billing purposes. Its name is generally a locality, often not the only one served by an NPA-NXX combination.
  3. Assignment date. N/A - mostly central office codes assigned before 2001.
  4. NXX prefixes last updated: November 22, 2025

Cities in area code 240

City1 County Time Zone1
Abell St Marys E
Accident Garrett E
Accokeek Prince George's E
Adamstown Frederick E
Andrews Afb Prince George's E
Aquasco Prince George's E
Ashton Montgomery E
Avenue St Marys E
Barnesville Montgomery E
Barton Allegany E
Beallsville Montgomery E
Bel Alton Charles E
Beltsville Prince George's E
Benedict Charles E
Bethesda Montgomery E
Big Pool Washington E
Bittinger Garrett E
Bladensburg Prince George's E
Bloomington Garrett E
Boonsboro Washington E
Bowie Prince George's E
Boyds Montgomery E
Braddock Heights Frederick E
Brandywine Prince George's E
Brentwood Prince George's E
Brinklow Montgomery E
Brookeville Montgomery E
Brownsville Washington E
Brunswick Frederick E
Bryans Road Charles E
Bryantown Charles E
Buckeystown Frederick E
Burkittsville Frederick E
Burtonsville Montgomery E
Bushwood St Marys E
Cabin John Montgomery E
California St Marys E
Callaway St Marys E
Capitol Heights Prince George's E
Cascade Washington E
Cavetown Washington E
Chaptico St Marys E
Charlotte Hall St Marys E
Cheltenham Prince George's E
Chevy Chase Montgomery E
Chewsville Washington E
Clarksburg Montgomery E
Clear Spring Washington E
Clements St Marys E
Clinton Prince George's E
Cobb Island Charles E
College Park Prince George's E
Coltons Point St Marys E
Compton St Marys E
Corriganville Allegany E
Cumberland Allegany E
Damascus Montgomery E
Dameron St Marys E
Derwood Montgomery E
Dickerson Montgomery E
District Heights Prince George's E
Drayden St Marys E
Eckhart Mines Allegany E
Ellerslie Allegany E
Emmitsburg Frederick E
Fairplay Washington E
Faulkner Charles E
Flintstone Allegany E
Fort Washington Prince George's E
Frederick Frederick E
Friendship Anne Arundel E
Friendsville Garrett E
Frostburg Allegany E
Funkstown Washington E
Gaithersburg Montgomery E
Garrett Park Montgomery E
Germantown Montgomery E
Glen Echo Montgomery E
Glenn Dale Prince George's E
Grantsville Garrett E
Great Mills St Marys E
Greenbelt Prince George's E
Hagerstown Washington E
Hancock Washington E
Helen St Marys E
Highland Howard E
Hollywood St Marys E
Hughesville Charles E
Hyattsville Prince George's E
Ijamsville Frederick E
Indian Head Charles E
Ironsides Charles E
Issue Charles E
Jefferson Frederick E
Keedysville Washington E
Kensington Montgomery E
Kitzmiller Garrett E
Knoxville Frederick E
La Plata Charles E
Ladiesburg Frederick E
Lanham Prince George's E
Laurel Anne Arundel E
Leonardtown St Marys E
Lexington Park St Marys E
Libertytown Frederick E
Little Orleans Allegany E
Lonaconing Allegany E
Loveville St Marys E
Luke Allegany E
Marbury Charles E
Maugansville Washington E
Mc Henry Garrett E
Mechanicsville St Marys E
Middletown Frederick E
Midland Allegany E
Midlothian Allegany E
Monrovia Frederick E
Montgomery Village Montgomery E
Morganza St Marys E
Mount Airy Frederick E
Mount Rainier Prince George's E
Mount Savage Allegany E
Mount Victoria Charles E
Myersville Frederick E
Nanjemoy Charles E
National Harbor Prince George's E
New Market Frederick E
New Midway Frederick E
Newburg Charles E
Oakland Garrett E
Oldtown Allegany E
Olney Montgomery E
Owings Calvert E
Oxon Hill Prince George's E
Park Hall St Marys E
Patuxent River St Marys E
Piney Point St Marys E
Pinto Allegany E
Point Of Rocks Frederick E
Pomfret Charles E
Poolesville Montgomery E
Port Tobacco Charles E
Potomac Montgomery E
Rawlings Allegany E
Ridge St Marys E
Riverdale Prince George's E
Rock Point Charles E
Rockville Montgomery E
Rocky Ridge Frederick E
Rohrersville Washington E
Sabillasville Frederick E
Sandy Spring Montgomery E
Scotland St Marys E
Sharpsburg Washington E
Silver Spring Montgomery E
Smithsburg Washington E
Southern MD Facility Prince George's E
Spencerville Montgomery E
Spring Gap Allegany E
St Inigoes St Marys E
St James Washington E
St Marys City St Marys E
Suburb Maryland Fac Montgomery E
Suitland Prince George's E
Swanton Garrett E
Takoma Park Montgomery E
Tall Timbers St Marys E
Temple Hills Prince George's E
Thurmont Frederick E
Tuscarora Frederick E
Unionville Frederick E
Upper Marlboro Prince George's E
Valley Lee St Marys E
Waldorf Charles E
Walkersville Frederick E
Washington Grove Montgomery E
Welcome Charles E
Westernport Allegany E
White Plains Charles E
Williamsport Washington E
Woodsboro Frederick E
  1. Listed above are most places served by USA area code 240. When multiple places in a US state share the same name we list the largest one only. Cities with population over 50,000 are displayed in bold text.
  2. E stands for Eastern Time (currently ).
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