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

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Area Code 301

Area code 301 is in Maryland, USA , spanning 11 counties and serving 181 cities , including Germantown, Frederick or Silver Spring; it currently uses 784 prefixes , assigned from 301-200-XXXX through 301-998-XXXX.

In service since January 01, 1947, area code 301 is the parent Numbering Plan Area in overlay complex 301/240/227.

The current local time is .

301 area code location on a map
© OpenStreetMap contributorsFor exact NPA boundaries see official 301 area code map

Phone number lookup

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More Maryland area codes:

  • 227
  • 240
  • 410
  • 443
  • 667

Locate any 301-NXX prefix:

301-200-XXXX --- 301-299-XXXX
NPANXX Area served[1] Provider[2] Date[3]
301-200 Indian Head Multiple 2/24/2011
301-201 Washington Zone 10 Multiple 11/7/2022
301-202 Washington Zone 2 Multiple 12/19/2008
301-203 Washington Zone 6 Verizon Maryland N/A
301-204 Washington Zone 2 Multiple N/A
301-205 Washington Zone 14 Multiple N/A
301-206 Washington Zone 13 Verizon Maryland N/A
301-207 Washington Zone 13 USA Mobility Wireless N/A
301-208 Gaithersburg Verizon Maryland N/A
301-209 Washington Zone 4 Verizon Maryland N/A
301-210 Laurel Verizon Maryland N/A
301-212 Washington Zone 10 Multiple N/A
301-213 Washington Zone 3 Omnipoint Communications Cap Operations N/A
301-214 Washington Zone 2 Verizon Maryland N/A
301-215 Washington Zone 2 Multiple N/A
301-216 Gaithersburg Verizon Maryland N/A
301-217 Washington Zone 10 Verizon Maryland N/A
301-218 Washington Zone 14 Verizon Maryland N/A
301-219 Washington Zone 2 New Cingular Wireless PCS N/A
301-220 Washington Zone 13 Multiple N/A
301-221 Washington Zone 2 New Cingular Wireless PCS N/A
301-222 Washington Zone 2 Multiple N/A
301-223 Williamsport Multiple N/A
301-224 Washington Zone 2 USA Mobility Wireless N/A
301-225 Washington Zone 14 Teleport Communications America 5/21/2009
301-226 Washington Zone 4 Verizon Maryland N/A
301-227 Washington Zone 2 Verizon Maryland N/A
301-228 Frederick Multiple N/A
301-229 Washington Zone 2 Verizon Maryland N/A
301-230 Washington Zone 11 Verizon Maryland N/A
301-231 Washington Zone 11 Multiple N/A
301-232 Ashton Multiple N/A
301-233 Washington Zone 3 Cellco Partnership N/A
301-234 Washington Zone 16 Multiple N/A
301-235 Washington Zone 16 Multiple N/A
301-236 Washington Zone 12 Verizon Maryland N/A
301-237 Washington Zone 3 Omnipoint Communications Cap Operations N/A
301-238 Washington Zone 16 Multiple N/A
301-239 Washington Zone 4 Verizon Maryland N/A
301-240 Washington Zone 10 Multiple N/A
301-241 Highfield Multiple N/A
301-242 Brandywine Multiple N/A
301-243 Washington Zone 2 Verizon Maryland 7/20/2006
301-244 Washington Zone 3 Multiple N/A
301-245 Bittinger Multiple N/A
301-246 Nanjemoy Multiple N/A
301-247 Leonardtown New Cingular Wireless PCS N/A
301-248 Washington Zone 6 Verizon Maryland N/A
301-249 Washington Zone 14 Verizon Maryland N/A
301-250 Gaithersburg Multiple N/A
301-251 Washington Zone 10 Verizon Maryland N/A
301-252 Gaithersburg MetroPCS N/A
301-253 Damascus Verizon Maryland N/A
301-254 Washington Zone 3 Omnipoint Communications Cap Operations N/A
301-255 Washington Zone 11 Multiple N/A
301-256 Laurel Multiple N/A
301-257 Washington Zone 3 Multiple N/A
301-258 Washington Zone 10 Verizon Maryland N/A
301-259 Tompkinsville Multiple N/A
301-260 Ashton Multiple N/A
301-261 Washington Zone 14 Verizon Maryland N/A
301-262 Washington Zone 14 Verizon Maryland N/A
301-263 Washington Zone 2 Multiple N/A
301-264 Mt Savage Multiple N/A
301-265 Washington Zone 6 Multiple N/A
301-266 Waldorf New Cingular Wireless PCS N/A
301-267 Washington Zone 3 Multiple 10/4/2011
301-268 Cumberland Uscoc Of Cumberland N/A
301-269 Washington Zone 2 Multiple 11/11/2014
301-270 Washington Zone 3 Verizon Maryland N/A
301-271 Thurmont Multiple N/A
301-272 Washington Zone 2 Multiple N/A
301-273 Washington Zone 3 Multiple N/A
301-274 Hughesville Multiple N/A
301-275 Washington Zone 2 New Cingular Wireless PCS N/A
301-276 Washington Zone 4 Multiple N/A
301-277 Washington Zone 4 Verizon Maryland N/A
301-278 Washington Zone 5 Multiple N/A
301-279 Washington Zone 10 Verizon Maryland N/A
301-280 Washington Zone 2 Verizon Maryland N/A
301-281 Washington Zone 6 Multiple N/A
301-282 Washington Zone 12 Verizon Maryland N/A
301-283 Washington Zone 6 Multiple N/A
301-284 Washington Zone 10 Multiple N/A
301-285 Washington Zone 3 Verizon Maryland N/A
301-286 Washington Zone 13 Verizon Maryland N/A
301-287 Washington Zone 11 Multiple N/A
301-288 Washington Zone 12 Multiple N/A
301-289 Washington Zone 13 Multiple N/A
301-290 Mechanicsville Multiple N/A
301-291 Washington Zone 14 Multiple N/A
301-292 Washington Zone 6 Verizon Maryland N/A
301-293 Myersville Verizon Maryland N/A
301-294 Washington Zone 10 Verizon Maryland N/A
301-295 Washington Zone 2 Verizon Maryland N/A
301-296 Washington Zone 10 Multiple N/A
301-297 Washington Zone 16 Multiple N/A
301-298 Washington Zone 15 Multiple N/A
301-299 Washington Zone 10 Verizon Maryland N/A
301-300-XXXX --- 301-399-XXXX
NPANXX Area served[1] Provider[2] Date[3]
301-300 Washington Zone 2 Multiple 3/30/2007
301-301 Gaithersburg Onvoy 8/30/2022
301-302 Hagerstown Multiple 10/5/2004
301-303 Washington Zone 13 USA Mobility Wireless N/A
301-304 Walkersville Multiple 3/6/2007
301-305 Frederick Multiple N/A
301-306 Washington Zone 4 Verizon Maryland N/A
301-307 Washington Zone 13 Multiple N/A
301-308 Washington Zone 13 USA Mobility Wireless N/A
301-309 Washington Zone 10 Multiple N/A
301-310 Laurel Multiple N/A
301-312 Washington Zone 2 Multiple N/A
301-313 Washington Zone 13 Multiple N/A
301-314 Washington Zone 4 Paetec Itel N/A
301-315 Washington Zone 10 Verizon Maryland N/A
301-316 Washington Zone 5 Multiple N/A
301-317 Laurel Verizon Maryland N/A
301-318 Washington Zone 2 New Cingular Wireless PCS N/A
301-319 Washington Zone 2 Verizon Maryland N/A
301-320 Washington Zone 2 Verizon Maryland N/A
301-321 Washington Zone 11 Multiple N/A
301-322 Washington Zone 4 Verizon Maryland N/A
301-323 Laurel Multiple N/A
301-324 Washington Zone 5 Verizon Maryland N/A
301-325 Washington Zone 3 Cellco Partnership N/A
301-326 Washington Zone 3 Multiple N/A
301-327 Washington Zone 15 Multiple 3/9/2006
301-328 Washington Zone 3 Multiple 6/21/2006
301-329 Ashton Multiple N/A
301-330 Gaithersburg Verizon Maryland N/A
301-331 Hagerstown Multiple N/A
301-332 Washington Zone 3 New Cingular Wireless PCS N/A
301-333 Washington Zone 5 Verizon Maryland N/A
301-334 Oakland Verizon Maryland N/A
301-335 Washington Zone 2 New Cingular Wireless PCS N/A
301-336 Washington Zone 5 Verizon Maryland N/A
301-337 Gaithersburg Multiple N/A
301-338 Cumberland Multiple 1/31/2006
301-339 Washington Zone 10 Multiple N/A
301-340 Washington Zone 10 Verizon Maryland N/A
301-341 Washington Zone 4 Verizon Maryland N/A
301-342 Lexington Park-Great Mills Verizon Maryland N/A
301-343 Washington Zone 5 MetroPCS N/A
301-344 Washington Zone 13 Verizon Maryland N/A
301-345 Washington Zone 13 Verizon Maryland N/A
301-346 Washington Zone 3 New Cingular Wireless PCS N/A
301-347 Washington Zone 2 Multiple N/A
301-348 Washington Zone 11 Multiple N/A
301-349 Poolesville Multiple N/A
301-350 Washington Zone 5 Verizon Maryland N/A
301-351 Washington Zone 3 Cellco Partnership N/A
301-352 Washington Zone 14 Verizon Maryland N/A
301-353 Washington Zone 10 Verizon Maryland N/A
301-354 Washington Zone 10 Multiple N/A
301-355 Gaithersburg Multiple 12/8/2005
301-356 Laurel Multiple N/A
301-357 Washington Zone 3 Multiple 10/12/2006
301-358 Washington Zone 15 Multiple N/A
301-359 Westernport Multiple N/A
301-360 Frederick Multiple N/A
301-361 Washington Zone 4 Level 3 Telecom Of Maryland N/A
301-362 Laurel Verizon Maryland N/A
301-363 Damascus Multiple 8/16/2006
301-364 Washington Zone 4 Multiple N/A
301-365 Washington Zone 2 Verizon Maryland N/A
301-366 Gaithersburg Multiple N/A
301-367 Washington Zone 3 Cellco Partnership N/A
301-368 Damascus Multiple N/A
301-369 Washington Zone 13 Verizon Maryland N/A
301-370 Gaithersburg MetroPCS N/A
301-371 Middletown Multiple N/A
301-372 Washington Zone 16 Multiple N/A
301-373 Leonardtown Multiple N/A
301-374 Waldorf Multiple N/A
301-375 Indian Head Multiple N/A
301-376 Laurel Verizon Maryland N/A
301-377 Laurel Multiple N/A
301-378 Frederick Multiple 2/20/2007
301-379 Washington Zone 3 Omnipoint Communications Cap Operations N/A
301-380 Washington Zone 2 Verizon Maryland N/A
301-381 Washington Zone 2 Onvoy 7/15/2022
301-382 Washington Zone 11 Verizon Maryland N/A
301-383 Washington Zone 14 Multiple N/A
301-384 Washington Zone 12 Verizon Maryland N/A
301-385 Washington Zone 2 New Cingular Wireless PCS N/A
301-386 Washington Zone 4 Verizon Maryland N/A
301-387 Oakland Multiple N/A
301-388 Washington Zone 12 Multiple N/A
301-389 Washington Zone 13 Multiple N/A
301-390 Washington Zone 14 Verizon Maryland N/A
301-391 Damascus Multiple N/A
301-392 La Plata Multiple N/A
301-393 Hagerstown Multiple N/A
301-394 Washington Zone 3 Verizon Maryland N/A
301-395 Laurel Cellco Partnership N/A
301-396 Waldorf Multiple N/A
301-397 Washington Zone 13 Multiple N/A
301-398 Washington Zone 10 Multiple 10/9/2003
301-399 Waldorf MetroPCS N/A
301-400-XXXX --- 301-499-XXXX
NPANXX Area served[1] Provider[2] Date[3]
301-400 Washington Zone 2 Verizon Maryland 3/29/2010
301-401 Frederick New Cingular Wireless PCS N/A
301-402 Washington Zone 2 Verizon Maryland N/A
301-403 Washington Zone 4 Verizon Maryland N/A
301-404 Washington Zone 3 Omnipoint Communications Cap Operations N/A
301-405 Washington Zone 4 Paetec Itel N/A
301-406 Washington Zone 2 USA Mobility Wireless N/A
301-407 Gaithersburg Multiple N/A
301-408 Washington Zone 3 Multiple N/A
301-409 Washington Zone 2 Multiple 12/21/2021
301-410 Washington Zone 6 Onvoy Spectrum 5/5/2022
301-412 Washington Zone 2 New Cingular Wireless PCS N/A
301-413 Washington Zone 11 Verizon Maryland N/A
301-414 Damascus Multiple N/A
301-415 Washington Zone 3 Verizon Maryland N/A
301-416 Myersville Multiple N/A
301-417 Washington Zone 10 Multiple N/A
301-418 Frederick Multiple 11/20/2002
301-419 Washington Zone 13 Verizon Maryland N/A
301-420 Washington Zone 5 Verizon Maryland N/A
301-421 Ashton Verizon Maryland N/A
301-422 Washington Zone 4 Verizon Maryland N/A
301-423 Washington Zone 5 Verizon Maryland N/A
301-424 Washington Zone 10 Verizon Maryland N/A
301-425 Washington Zone 13 Verizon Maryland N/A
301-426 Washington Zone 13 Multiple N/A
301-427 Washington Zone 3 Verizon Maryland N/A
301-428 Washington Zone 10 Verizon Maryland N/A
301-429 Washington Zone 4 Verizon Maryland N/A
301-430 Washington Zone 14 Multiple N/A
301-431 Washington Zone 3 Verizon Maryland N/A
301-432 Keedysville Verizon Maryland N/A
301-433 Washington Zone 5 Multiple N/A
301-434 Washington Zone 3 Verizon Maryland N/A
301-435 Washington Zone 2 Verizon Maryland N/A
301-436 Washington Zone 4 Verizon Maryland N/A
301-437 Washington Zone 3 Omnipoint Communications Cap Operations N/A
301-438 Washington Zone 12 Multiple N/A
301-439 Washington Zone 3 Verizon Maryland N/A
301-440 Washington Zone 5 MetroPCS N/A
301-441 Washington Zone 13 Verizon Maryland N/A
301-442 Washington Zone 3 Omnipoint Communications Cap Operations N/A
301-443 Washington Zone 11 Verizon Maryland N/A
301-444 Washington Zone 10 Multiple N/A
301-445 Washington Zone 3 Verizon Maryland N/A
301-446 Washington Zone 13 Multiple N/A
301-447 Emmitsburg Multiple N/A
301-448 Washington Zone 3 Multiple N/A
301-449 Washington Zone 5 Verizon Maryland N/A
301-450 Washington Zone 3 Multiple 7/15/2022
301-451 Washington Zone 2 Verizon Maryland N/A
301-452 Washington Zone 3 Cellco Partnership N/A
301-453 Kitzmiller Multiple N/A
301-454 Washington Zone 4 Multiple N/A
301-455 Washington Zone 3 Omnipoint Communications Cap Operations N/A
301-456 Washington Zone 5 Multiple N/A
301-457 Washington Zone 3 Verizon Maryland N/A
301-458 Washington Zone 4 Multiple N/A
301-459 Washington Zone 4 Verizon Maryland N/A
301-460 Washington Zone 11 Verizon Maryland N/A
301-461 Washington Zone 10 Cellco Partnership N/A
301-462 Myersville Multiple N/A
301-463 Lonaconing Multiple N/A
301-464 Washington Zone 14 Verizon Maryland N/A
301-465 Myersville Multiple N/A
301-466 Washington Zone 3 Cellco Partnership N/A
301-467 Washington Zone 3 Cellco Partnership N/A
301-468 Washington Zone 11 Verizon Maryland N/A
301-469 Washington Zone 2 Verizon Maryland N/A
301-470 Washington Zone 14 Multiple N/A
301-471 Frederick Cellco Partnership N/A
301-472 Mechanicsville Verizon Maryland N/A
301-473 Frederick Multiple N/A
301-474 Washington Zone 13 Verizon Maryland N/A
301-475 Leonardtown Verizon Maryland N/A
301-476 Ashton Multiple N/A
301-477 Washington Zone 13 Multiple N/A
301-478 Flintstone Multiple N/A
301-479 Washington Zone 13 Multiple N/A
301-480 Washington Zone 2 Verizon Maryland N/A
301-481 Leonardtown Cellco Partnership N/A
301-482 Damascus Multiple N/A
301-483 Laurel Verizon Maryland N/A
301-484 Washington Zone 4 Comcast IP Phone N/A
301-485 Washington Zone 6 Multiple N/A
301-486 Washington Zone 13 Multiple N/A
301-487 Myersville Verizon Maryland N/A
301-488 Washington Zone 13 Verizon Maryland N/A
301-489 Washington Zone 13 Multiple N/A
301-490 Laurel Verizon Maryland N/A
301-491 Hagerstown Uscoc Of Cumberland N/A
301-492 Washington Zone 2 Verizon Maryland N/A
301-493 Washington Zone 2 Verizon Maryland N/A
301-494 Washington Zone 15 Multiple N/A
301-495 Washington Zone 3 Verizon Maryland N/A
301-496 Washington Zone 2 Verizon Maryland N/A
301-497 Laurel Verizon Maryland N/A
301-498 Laurel Verizon Maryland N/A
301-499 Washington Zone 5 Verizon Maryland N/A
301-500-XXXX --- 301-599-XXXX
NPANXX Area served[1] Provider[2] Date[3]
301-500 Washington Zone 2 Multiple N/A
301-501 Oakland Multiple N/A
301-502 Washington Zone 3 Cellco Partnership N/A
301-503 Washington Zone 2 New Cingular Wireless PCS N/A
301-504 Washington Zone 3 Verizon Maryland N/A
301-505 Washington Zone 6 Verizon Maryland N/A
301-506 Washington Zone 13 USA Mobility Wireless N/A
301-507 Washington Zone 13 Multiple N/A
301-508 Myersville Multiple N/A
301-509 Washington Zone 3 Cellco Partnership N/A
301-510 Washington Zone 13 USA Mobility Wireless N/A
301-512 Washington Zone 3 Cellco Partnership N/A
301-513 Washington Zone 13 Multiple N/A
301-514 Frederick Cellco Partnership N/A
301-515 Gaithersburg Verizon Maryland N/A
301-516 Washington Zone 5 Verizon Maryland N/A
301-517 Washington Zone 10 Multiple N/A
301-518 Washington Zone 3 Cellco Partnership N/A
301-519 Gaithersburg Verizon Maryland N/A
301-520 Washington Zone 3 Cellco Partnership N/A
301-521 Washington Zone 6 Verizon Maryland N/A
301-522 Washington Zone 11 Verizon Maryland N/A
301-523 Washington Zone 3 Omnipoint Communications Cap Operations N/A
301-524 Frederick Omnipoint Communications Cap Operations N/A
301-525 Gaithersburg Multiple 10/16/2003
301-526 Washington Zone 3 New Cingular Wireless PCS N/A
301-527 Gaithersburg Verizon Maryland N/A
301-528 Gaithersburg Verizon Maryland N/A
301-529 Washington Zone 10 New Cingular Wireless PCS N/A
301-530 Washington Zone 2 Verizon Maryland N/A
301-531 Washington Zone 4 Multiple N/A
301-532 Laurel Multiple 2/20/2015
301-533 Oakland Multiple N/A
301-534 Indian Head Ymax Communications Corp. 11/15/2006
301-535 Waldorf New Cingular Wireless PCS N/A
301-536 Leonardtown Multiple N/A
301-537 Washington Zone 3 Omnipoint Communications Cap Operations N/A
301-538 Washington Zone 2 New Cingular Wireless PCS N/A
301-539 La Plata Multiple N/A
301-540 Gaithersburg Verizon Maryland N/A
301-541 Washington Zone 5 Multiple N/A
301-542 Waldorf Multiple N/A
301-543 Laurel Multiple N/A
301-544 Washington Zone 10 Verizon Maryland N/A
301-545 Washington Zone 10 Multiple N/A
301-546 Washington Zone 4 Verizon Maryland 4/7/2014
301-547 Washington Zone 2 Multiple N/A
301-548 Washington Zone 10 Verizon Maryland N/A
301-549 Ashton Multiple N/A
301-550 Washington Zone 10 Multiple 7/26/2022
301-551 Washington Zone 3 Baltimore-Washington Telephone N/A
301-552 Washington Zone 13 Verizon Maryland N/A
301-553 Waldorf USA Mobility Wireless N/A
301-554 Washington Zone 2 USA Mobility Wireless N/A
301-556 Gaithersburg Multiple N/A
301-557 Washington Zone 3 Multiple 9/6/2011
301-558 Washington Zone 13 Multiple N/A
301-559 Washington Zone 4 Verizon Maryland N/A
301-560 Washington Zone 4 Paetec Itel N/A
301-561 Washington Zone 3 Baltimore-Washington Telephone N/A
301-562 Washington Zone 3 Verizon Maryland N/A
301-563 Washington Zone 3 Multiple N/A
301-564 Washington Zone 2 Verizon Maryland N/A
301-565 Washington Zone 3 Verizon Maryland N/A
301-566 Washington Zone 13 Verizon Maryland N/A
301-567 Washington Zone 6 Verizon Maryland N/A
301-568 Washington Zone 5 Verizon Maryland N/A
301-569 Gaithersburg Multiple N/A
301-570 Ashton Verizon Maryland N/A
301-571 Washington Zone 2 Verizon Maryland N/A
301-572 Washington Zone 3 Verizon Maryland N/A
301-573 Hagerstown Multiple N/A
301-574 Washington Zone 15 Multiple N/A
301-575 Laurel Multiple N/A
301-576 Washington Zone 3 Paetec Itel N/A
301-577 Washington Zone 4 Verizon Maryland N/A
301-578 Washington Zone 3 Multiple N/A
301-579 Brandywine Multiple N/A
301-580 Washington Zone 3 Cellco Partnership N/A
301-581 Washington Zone 2 Verizon Maryland N/A
301-582 Hagerstown Multiple N/A
301-583 Washington Zone 4 Multiple N/A
301-584 Washington Zone 12 Baltimore-Washington Telephone N/A
301-585 Washington Zone 3 Verizon Maryland N/A
301-586 Washington Zone 3 Multiple N/A
301-587 Washington Zone 3 Verizon Maryland N/A
301-588 Washington Zone 3 Verizon Maryland N/A
301-589 Washington Zone 3 Verizon Maryland N/A
301-590 Washington Zone 10 Multiple N/A
301-591 Gaithersburg Multiple N/A
301-592 Washington Zone 3 Multiple N/A
301-593 Washington Zone 3 Verizon Maryland N/A
301-594 Washington Zone 2 Verizon Maryland N/A
301-595 Washington Zone 13 Verizon Maryland N/A
301-596 Laurel Verizon Maryland N/A
301-597 Hancock Multiple N/A
301-598 Washington Zone 12 Verizon Maryland N/A
301-599 Washington Zone 5 Verizon Maryland N/A
301-600-XXXX --- 301-699-XXXX
NPANXX Area served[1] Provider[2] Date[3]
301-600 Frederick Verizon Maryland 7/6/2006
301-601 Washington Zone 10 Verizon Maryland N/A
301-602 Washington Zone 3 Cellco Partnership N/A
301-603 Washington Zone 11 Multiple N/A
301-604 Laurel Verizon Maryland N/A
301-605 Washington Zone 10 Multiple N/A
301-606 Frederick Cellco Partnership N/A
301-607 Damascus Multiple N/A
301-608 Washington Zone 3 Verizon Maryland N/A
301-609 Waldorf Multiple N/A
301-610 Washington Zone 10 Multiple N/A
301-612 Washington Zone 14 Multiple 10/11/2012
301-613 Washington Zone 3 Omnipoint Communications Cap Operations N/A
301-614 Washington Zone 13 Verizon Maryland N/A
301-615 Washington Zone 13 Bandwidth.com Clec N/A
301-616 Oakland Uscoc Of Cumberland N/A
301-617 Laurel Verizon Maryland N/A
301-618 Washington Zone 4 Multiple N/A
301-619 Frederick Verizon Maryland N/A
301-620 Frederick Verizon Maryland N/A
301-621 Washington Zone 14 Verizon Maryland N/A
301-622 Washington Zone 3 Verizon Maryland N/A
301-623 Washington Zone 13 Multiple N/A
301-624 Frederick Multiple N/A
301-625 Washington Zone 3 Verizon Maryland N/A
301-626 Washington Zone 3 Verizon Maryland N/A
301-627 Washington Zone 15 Verizon Maryland N/A
301-628 Washington Zone 3 Multiple N/A
301-629 Washington Zone 14 Multiple N/A
301-630 Washington Zone 6 Verizon Maryland N/A
301-631 Frederick Multiple N/A
301-632 Waldorf Multiple N/A
301-633 Washington Zone 2 New Cingular Wireless PCS N/A
301-634 Washington Zone 2 Teleport Communications America N/A
301-635 Washington Zone 5 Multiple 7/27/2022
301-636 Washington Zone 5 Multiple N/A
301-637 Washington Zone 10 Multiple N/A
301-638 Waldorf Multiple N/A
301-639 Frederick Cellco Partnership N/A
301-640 Washington Zone 10 Multiple N/A
301-641 Washington Zone 3 Cellco Partnership N/A
301-642 Washington Zone 2 New Cingular Wireless PCS N/A
301-643 Waldorf Cellco Partnership N/A
301-644 Frederick Multiple N/A
301-645 Waldorf Verizon Maryland N/A
301-646 Washington Zone 2 New Cingular Wireless PCS N/A
301-647 Washington Zone 13 American Messaging Services N/A
301-648 Washington Zone 2 New Cingular Wireless PCS N/A
301-649 Washington Zone 11 Verizon Maryland N/A
301-650 Washington Zone 3 Verizon Maryland N/A
301-651 Washington Zone 3 Cellco Partnership N/A
301-652 Washington Zone 2 Verizon Maryland N/A
301-653 Waldorf New Cingular Wireless PCS N/A
301-654 Washington Zone 2 Verizon Maryland N/A
301-655 Washington Zone 2 New Cingular Wireless PCS N/A
301-656 Washington Zone 2 Verizon Maryland N/A
301-657 Washington Zone 2 Verizon Maryland N/A
301-658 Ashton Multiple N/A
301-659 Waldorf Multiple N/A
301-660 Keedysville Multiple 3/19/2004
301-661 Washington Zone 2 New Cingular Wireless PCS N/A
301-662 Frederick Verizon Maryland N/A
301-663 Frederick Verizon Maryland N/A
301-664 Washington Zone 2 Multiple N/A
301-665 Hagerstown Multiple N/A
301-666 Washington Zone 14 Multiple N/A
301-667 Myersville New Cingular Wireless PCS N/A
301-668 Frederick Verizon Maryland N/A
301-669 Washington Zone 5 Verizon Maryland N/A
301-670 Washington Zone 10 Verizon Maryland N/A
301-671 Hagerstown Bandwidth.com Clec N/A
301-672 Lexington Park-Great Mills Multiple N/A
301-673 Frederick Multiple N/A
301-674 Washington Zone 2 Multiple N/A
301-675 Washington Zone 3 Omnipoint Communications Cap Operations N/A
301-676 Frederick New Cingular Wireless PCS N/A
301-677 Washington Zone 14 Teleport Communications America N/A
301-678 Hancock Multiple N/A
301-679 Washington Zone 12 Multiple N/A
301-680 Washington Zone 3 Verizon Maryland N/A
301-681 Washington Zone 3 Verizon Maryland N/A
301-682 Frederick Multiple N/A
301-683 Washington Zone 4 Multiple N/A
301-684 Indian Head Multiple N/A
301-685 Damascus Multiple N/A
301-686 Washington Zone 6 Multiple N/A
301-687 Frostburg Multiple N/A
301-688 Washington Zone 13 Verizon Maryland N/A
301-689 Frostburg Multiple N/A
301-690 Leonardtown Multiple 5/23/2007
301-691 Poolesville Multiple N/A
301-692 Washington Zone 11 Multiple N/A
301-693 Frederick Omnipoint Communications Cap Operations N/A
301-694 Frederick Verizon Maryland N/A
301-695 Frederick Verizon Maryland N/A
301-696 Frederick Verizon Maryland N/A
301-697 Cumberland New Cingular Wireless PCS N/A
301-698 Frederick Verizon Maryland N/A
301-699 Washington Zone 4 Verizon Maryland N/A
301-701-XXXX --- 301-799-XXXX
NPANXX Area served[1] Provider[2] Date[3]
301-701 Washington Zone 13 Multiple N/A
301-702 Washington Zone 5 Verizon Maryland N/A
301-703 Mount Airy Multiple 8/29/2002
301-704 Washington Zone 3 Cellco Partnership N/A
301-705 Waldorf Verizon Maryland N/A
301-706 Washington Zone 3 Cellco Partnership N/A
301-707 Cumberland Uscoc Of Cumberland N/A
301-708 Laurel Multiple N/A
301-709 Cumberland Multiple 5/28/2019
301-710 Waldorf Multiple 12/30/2005
301-712 Frederick Multiple N/A
301-713 Washington Zone 3 Verizon Maryland N/A
301-714 Hagerstown Multiple N/A
301-715 Washington Zone 15 Multiple N/A
301-716 Washington Zone 13 Verizon Maryland N/A
301-717 Washington Zone 3 Cellco Partnership N/A
301-718 Washington Zone 2 Verizon Maryland N/A
301-719 Washington Zone 16 Multiple N/A
301-720 Brandywine Multiple N/A
301-721 Washington Zone 10 Verizon Maryland N/A
301-722 Cumberland Verizon Maryland N/A
301-723 Cumberland Multiple N/A
301-724 Cumberland Verizon Maryland N/A
301-725 Laurel Verizon Maryland N/A
301-726 Kitzmiller MCIMetro Access Transmission Services 02/07/2023
301-727 Washington Zone 5 Baltimore-Washington Telephone N/A
301-728 Washington Zone 3 Omnipoint Communications Cap Operations N/A
301-729 Cumberland Verizon Maryland N/A
301-730 Myersville New Cingular Wireless PCS N/A
301-731 Washington Zone 4 Verizon Maryland N/A
301-732 Frederick Multiple N/A
301-733 Hagerstown Verizon Maryland N/A
301-734 Washington Zone 3 Verizon Maryland N/A
301-735 Washington Zone 5 Verizon Maryland N/A
301-736 Washington Zone 5 Verizon Maryland N/A
301-737 Lexington Park-Great Mills Verizon Maryland N/A
301-738 Washington Zone 10 Verizon Maryland N/A
301-739 Hagerstown Verizon Maryland N/A
301-740 Gaithersburg Multiple 4/22/2004
301-741 Laurel Multiple N/A
301-742 Washington Zone 2 New Cingular Wireless PCS N/A
301-743 Indian Head Multiple N/A
301-744 Indian Head Multiple N/A
301-745 Hagerstown Multiple N/A
301-746 Friendsville Multiple N/A
301-747 Washington Zone 6 Multiple N/A
301-748 Frederick Multiple N/A
301-749 Washington Zone 6 Verizon Maryland N/A
301-750 Friendsville Multiple 3/18/2004
301-751 Waldorf Cellco Partnership N/A
301-752 Waldorf Cellco Partnership N/A
301-753 Washington Zone 6 Multiple N/A
301-754 Washington Zone 3 Multiple N/A
301-755 Washington Zone 3 Multiple N/A
301-756 Washington Zone 14 Multiple N/A
301-757 Lexington Park-Great Mills Verizon Maryland N/A
301-758 Washington Zone 3 Cellco Partnership N/A
301-759 Cumberland Verizon Maryland N/A
301-760 Washington Zone 2 Multiple 2/27/2002
301-761 Washington Zone 11 Multiple 2/27/2002
301-762 Washington Zone 10 Verizon Maryland N/A
301-763 Washington Zone 5 Verizon Maryland N/A
301-764 Waldorf Multiple N/A
301-765 Washington Zone 10 Multiple N/A
301-766 Hagerstown Verizon Maryland N/A
301-767 Washington Zone 2 Multiple N/A
301-768 Washington Zone 3 Multiple 2/27/2002
301-769 Leonardtown Multiple N/A
301-770 Washington Zone 11 Verizon Maryland N/A
301-771 Washington Zone 2 Multiple N/A
301-772 Washington Zone 4 Verizon Maryland N/A
301-773 Washington Zone 4 Verizon Maryland N/A
301-774 Ashton Verizon Maryland N/A
301-775 Washington Zone 3 Cellco Partnership N/A
301-776 Laurel Verizon Maryland N/A
301-777 Cumberland Verizon Maryland N/A
301-778 Washington Zone 5 Multiple N/A
301-779 Washington Zone 4 Verizon Maryland N/A
301-780 Washington Zone 15 Multiple N/A
301-781 Frostburg Onvoy Spectrum N/A
301-782 Brandywine Multiple N/A
301-783 Cumberland Bandwidth.com Clec N/A
301-784 Cumberland Multiple N/A
301-785 Washington Zone 3 Cellco Partnership N/A
301-786 Mccoole Multiple N/A
301-787 Washington Zone 3 Cellco Partnership N/A
301-788 Frederick Cellco Partnership N/A
301-789 Washington Zone 4 Multiple 8/13/2002
301-790 Hagerstown Verizon Maryland N/A
301-791 Hagerstown Verizon Maryland N/A
301-792 Washington Zone 3 Omnipoint Communications Cap Operations N/A
301-793 Washington Zone 3 Omnipoint Communications Cap Operations N/A
301-794 Washington Zone 14 Multiple N/A
301-795 Washington Zone 10 Multiple N/A
301-796 Washington Zone 13 Verizon Maryland 6/30/2003
301-797 Hagerstown Verizon Maryland N/A
301-798 Damascus Multiple N/A
301-799 Keedysville Multiple 3/18/2004
301-800-XXXX --- 301-899-XXXX
NPANXX Area served[1] Provider[2] Date[3]
301-800 Hagerstown Multiple N/A
301-801 Washington Zone 3 Cellco Partnership N/A
301-802 Washington Zone 3 Cellco Partnership N/A
301-803 Washington Zone 2 Multiple N/A
301-804 Ashton Multiple N/A
301-805 Washington Zone 14 Verizon Maryland N/A
301-806 Washington Zone 3 Omnipoint Communications Cap Operations N/A
301-807 Washington Zone 3 Cellco Partnership N/A
301-808 Washington Zone 5 Verizon Maryland N/A
301-809 Washington Zone 14 Multiple N/A
301-810 Buckeyestown Multiple N/A
301-812 Washington Zone 15 Multiple N/A
301-813 Washington Zone 2 Baltimore-Washington Telephone N/A
301-814 Washington Zone 2 New Cingular Wireless PCS N/A
301-815 Frederick Verizon Maryland N/A
301-816 Washington Zone 11 Verizon Maryland N/A
301-817 Washington Zone 5 Verizon Maryland N/A
301-818 Waldorf Bandwidth.com Clec N/A
301-819 Washington Zone 3 Verizon Maryland N/A
301-820 Gaithersburg Multiple N/A
301-821 Laurel Multiple N/A
301-822 Washington Zone 11 Multiple N/A
301-823 Washington Zone 13 Multiple N/A
301-824 Smithsburg Multiple N/A
301-825 Washington Zone 10 Multiple N/A
301-826 Lexington Park-Great Mills Verizon Maryland N/A
301-827 Washington Zone 2 Verizon Maryland N/A
301-828 Washington Zone 2 Multiple N/A
301-829 Mount Airy Verizon Maryland N/A
301-830 Washington Zone 3 Multiple N/A
301-831 Damascus Verizon Maryland N/A
301-832 Washington Zone 4 Multiple N/A
301-833 Washington Zone 14 Multiple N/A
301-834 Brunswick Multiple N/A
301-835 Frederick Multiple 11/27/2018
301-836 Washington Zone 5 Multiple N/A
301-837 Washington Zone 13 MCIMetro Access Transmission Services N/A
301-838 Washington Zone 10 Multiple N/A
301-839 Washington Zone 6 Verizon Maryland N/A
301-840 Washington Zone 10 Verizon Maryland N/A
301-841 Washington Zone 2 Multiple N/A
301-842 Clear Spg Multiple N/A
301-843 Washington Zone 6 Verizon Maryland N/A
301-844 Washington Zone 3 Multiple 10/4/2011
301-845 Walkersville Multiple N/A
301-846 Frederick Multiple N/A
301-847 Washington Zone 12 Multiple N/A
301-848 Waldorf Cellco Partnership N/A
301-849 Oakland Bandwidth.com Clec N/A
301-850 Washington Zone 14 Multiple N/A
301-851 Washington Zone 4 Multiple N/A
301-852 Washington Zone 4 Multiple N/A
301-853 Washington Zone 4 Verizon Maryland N/A
301-854 Ashton Multiple N/A
301-855 Washington Zone 15 Verizon Maryland N/A
301-856 Washington Zone 16 Verizon Maryland N/A
301-857 Clear Spg Multiple 7/12/2002
301-858 Washington Zone 14 Verizon Maryland N/A
301-859 Oakland Multiple 1/9/2002
301-860 Washington Zone 14 Multiple N/A
301-861 Waldorf Multiple N/A
301-862 Lexington Park-Great Mills Multiple N/A
301-863 Lexington Park-Great Mills Verizon Maryland N/A
301-864 Washington Zone 4 Verizon Maryland N/A
301-865 New Market Verizon Maryland N/A
301-866 Lexington Park-Great Mills Multiple N/A
301-867 Washington Zone 14 Multiple N/A
301-868 Washington Zone 16 Verizon Maryland N/A
301-869 Gaithersburg Verizon Maryland N/A
301-870 Washington Zone 6 Verizon Maryland N/A
301-871 Washington Zone 11 Verizon Maryland N/A
301-872 Ridge Multiple N/A
301-873 Washington Zone 3 Cellco Partnership N/A
301-874 Buckeyestown Verizon Maryland N/A
301-875 Laurel Multiple N/A
301-876 Cumberland Multiple 5/2/2002
301-877 Washington Zone 16 Verizon Maryland N/A
301-878 Baltimore MCIMetro Access Transmission Services N/A
301-879 Washington Zone 12 Verizon Maryland N/A
301-880 Lexington Park-Great Mills Multiple N/A
301-881 Washington Zone 11 Verizon Maryland N/A
301-882 New Market Multiple 3/18/2004
301-883 Washington Zone 5 Multiple N/A
301-884 Mechanicsville Verizon Maryland N/A
301-885 Waldorf Multiple N/A
301-886 Washington Zone 13 Multiple N/A
301-887 Washington Zone 4 Multiple N/A
301-888 Washington Zone 16 Multiple N/A
301-889 Washington Zone 14 Multiple N/A
301-890 Washington Zone 12 Verizon Maryland N/A
301-891 Washington Zone 3 Multiple N/A
301-892 Washington Zone 4 Multiple 3/11/2005
301-893 Washington Zone 6 Multiple N/A
301-894 Washington Zone 6 Verizon Maryland N/A
301-895 Grantsville Multiple N/A
301-896 Washington Zone 2 Verizon Maryland N/A
301-897 Washington Zone 2 Verizon Maryland N/A
301-898 Frederick Multiple N/A
301-899 Washington Zone 5 Verizon Maryland N/A
301-900-XXXX --- 301-998-XXXX
NPANXX Area served[1] Provider[2] Date[3]
301-900 Washington Zone 2 Onvoy 2/18/2015
301-901 Washington Zone 13 Multiple N/A
301-902 Washington Zone 13 Multiple N/A
301-903 Washington Zone 10 Verizon Maryland N/A
301-904 Leonardtown Cellco Partnership N/A
301-905 Washington Zone 3 Multiple N/A
301-906 Washington Zone 2 New Cingular Wireless PCS N/A
301-907 Washington Zone 2 Multiple N/A
301-908 Washington Zone 3 Cellco Partnership N/A
301-909 Washington Zone 5 Multiple N/A
301-910 Washington Zone 2 New Cingular Wireless PCS N/A
301-912 Washington Zone 14 Multiple N/A
301-913 Washington Zone 2 Multiple N/A
301-914 Oakland Multiple 12/27/2012
301-915 Washington Zone 2 Multiple N/A
301-916 Gaithersburg Verizon Maryland N/A
301-917 Washington Zone 10 Multiple N/A
301-918 Washington Zone 4 Multiple N/A
301-919 Washington Zone 2 New Cingular Wireless PCS N/A
301-920 Washington Zone 3 Multiple N/A
301-921 Washington Zone 10 Multiple N/A
301-922 Washington Zone 3 Cellco Partnership N/A
301-923 Washington Zone 13 Multiple N/A
301-924 Washington Zone 12 Verizon Maryland N/A
301-925 Washington Zone 5 Verizon Maryland N/A
301-926 Gaithersburg Verizon Maryland N/A
301-927 Washington Zone 4 Verizon Maryland N/A
301-928 Washington Zone 3 Cellco Partnership N/A
301-929 Washington Zone 11 Verizon Maryland N/A
301-930 Washington Zone 3 Verizon Maryland N/A
301-931 Washington Zone 13 Multiple N/A
301-932 Waldorf Verizon Maryland N/A
301-933 Washington Zone 11 Verizon Maryland N/A
301-934 La Plata Verizon Maryland N/A
301-935 Washington Zone 13 Multiple N/A
301-936 Hagerstown Multiple 6/2/2017
301-937 Washington Zone 13 Verizon Maryland N/A
301-938 Washington Zone 3 Cellco Partnership N/A
301-939 Washington Zone 13 Multiple N/A
301-940 Washington Zone 2 Verizon Maryland N/A
301-941 Washington Zone 2 Multiple N/A
301-942 Washington Zone 11 Verizon Maryland N/A
301-943 Washington Zone 3 Cellco Partnership N/A
301-944 Gaithersburg Multiple N/A
301-945 Washington Zone 11 Multiple N/A
301-946 Washington Zone 11 Verizon Maryland N/A
301-947 Gaithersburg Verizon Maryland N/A
301-948 Washington Zone 10 Verizon Maryland N/A
301-949 Washington Zone 11 Verizon Maryland N/A
301-951 Washington Zone 2 Verizon Maryland N/A
301-952 Washington Zone 15 Verizon Maryland N/A
301-953 Washington Zone 13 Multiple N/A
301-955 Washington Zone 4 Multiple N/A
301-956 Gaithersburg Multiple 5/22/2002
301-957 Laurel Multiple N/A
301-960 Washington Zone 3 Multiple N/A
301-961 Washington Zone 2 Verizon Maryland N/A
301-962 Washington Zone 11 Multiple N/A
301-963 Gaithersburg Verizon Maryland N/A
301-964 Myersville Multiple N/A
301-965 Washington Zone 6 Multiple N/A
301-966 Washington Zone 12 Multiple N/A
301-967 Washington Zone 5 Verizon Maryland N/A
301-968 Washington Zone 2 Multiple N/A
301-969 Brunswick Multiple 3/6/2007
301-970 Washington Zone 14 Multiple N/A
301-971 Washington Zone 6 Multiple N/A
301-972 Gaithersburg Verizon Maryland N/A
301-973 Washington Zone 14 Multiple N/A
301-974 Laurel Multiple N/A
301-975 Washington Zone 10 Multiple N/A
301-977 Gaithersburg Verizon Maryland N/A
301-978 Washington Zone 10 Multiple N/A
301-979 Washington Zone 10 Multiple N/A
301-980 Washington Zone 3 Cellco Partnership N/A
301-981 Washington Zone 5 Level 3 Telecom Of Maryland N/A
301-982 Washington Zone 13 Verizon Maryland N/A
301-983 Washington Zone 10 Verizon Maryland N/A
301-984 Washington Zone 11 Verizon Maryland N/A
301-985 Washington Zone 4 Multiple N/A
301-986 Washington Zone 2 Verizon Maryland N/A
301-987 Gaithersburg Verizon Maryland N/A
301-988 Hagerstown Uscoc Of Cumberland N/A
301-989 Washington Zone 12 Verizon Maryland N/A
301-990 Gaithersburg Verizon Maryland N/A
301-991 Hagerstown Multiple N/A
301-992 Hagerstown Multiple N/A
301-993 Washington Zone 13 Verizon Maryland N/A
301-994 Lexington Park-Great Mills Multiple N/A
301-995 Lexington Park-Great Mills Verizon Maryland N/A
301-996 Washington Zone 3 Omnipoint Communications Cap Operations N/A
301-997 Leonardtown Multiple N/A
301-998 Washington Zone 11 Verizon Maryland N/A
  1. 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.
  2. A single provider refers to the original company controlling a whole NPA-NXX block (10,000 phone numbers). With Number Pooling, NPA-NXX blocks can be split into ten 1,000 phone number blocks and handed over to other service providers (available in the USA and Puerto Rico).
  3. Assignment date. N/A: unavailable date or central office code assigned before 2001.
  4. NXX prefixes last updated: February 13, 2026

Cities in area code 301

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 301. 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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