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

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Area code 720 is in Colorado, USA , spanning 14 counties and serving 74 cities , including Denver, Thornton or Arvada; it currently uses 785 prefixes , assigned from 720-200-XXXX through 720-999-XXXX.

In service since June 01, 1998, area code 720 is an overlay Numbering Plan Area, part of overlay complex 303/720/983.

The current local time is .

720 area code location on a map
© OpenStreetMap contributorsFor exact NPA boundaries see official 720 area code map

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More Colorado area codes:

  • 303
  • 719
  • 748
  • 970
  • 983

Locate any 720-NXX prefix:

720-200-XXXX --- 720-299-XXXX
NPANXX Carrier1 Area Served2 Date3
720-200 Qwest Corporation Denver N/A
720-201 New Cingular Wireless PCS Denver N/A
720-202 Cellco Partnership Denver 10/7/2009
720-203 T-Mobile USA Denver 1/29/2001
720-204 Level 3 Communications Longmont N/A
720-205 T-Mobile USA Denver N/A
720-206 MCIMetro Access Transmission Services Denver N/A
720-207 MCIMetro Access Transmission Services Denver N/A
720-208 MCIMetro Access Transmission Services Denver N/A
720-209 T-Mobile USA Denver N/A
720-210 MCIMetro Access Transmission Services Denver N/A
720-212 MCIMetro Access Transmission Services Denver N/A
720-213 Paetec Itel Denver N/A
720-214 Paetec Itel Denver N/A
720-215 Cellco Partnership Denver 10/12/2009
720-216 Teleport Communications America Denver 1/29/2001
720-217 T-Mobile USA Denver N/A
720-218 T-Mobile USA Denver N/A
720-219 Cellco Partnership Denver N/A
720-220 T-Mobile USA Denver N/A
720-221 MCIMetro Access Transmission Services Denver N/A
720-222 MCIMetro Access Transmission Services Denver N/A
720-223 MCIMetro Access Transmission Services Denver N/A
720-224 MCIMetro Access Transmission Services Denver N/A
720-225 MCIMetro Access Transmission Services Denver N/A
720-226 MCIMetro Access Transmission Services Denver N/A
720-227 MCIMetro Access Transmission Services Denver N/A
720-228 MCIMetro Access Transmission Services Denver N/A
720-229 MCIMetro Access Transmission Services Denver N/A
720-230 Xo Colorado Denver N/A
720-231 T-Mobile USA Denver N/A
720-232 T-Mobile USA Denver N/A
720-233 T-Mobile USA Denver N/A
720-234 T-Mobile USA Denver N/A
720-235 T-Mobile USA Denver N/A
720-236 T-Mobile USA Denver N/A
720-237 New Cingular Wireless PCS Denver 9/28/2009
720-238 T-Mobile USA Denver N/A
720-239 Teleport Communications America Denver N/A
720-240 MCIMetro Access Transmission Services Denver N/A
720-241 MCIMetro Access Transmission Services Denver N/A
720-242 Qwest Corporation Denver 10/9/2008
720-243 New Cingular Wireless PCS Denver 6/30/2009
720-244 New Cingular Wireless PCS Denver N/A
720-245 Electric Lightwave Denver 11/21/2011
720-246 MCIMetro Access Transmission Services Denver N/A
720-247 MCIMetro Access Transmission Services Denver 5/20/2004
720-248 Onvoy Denver N/A
720-249 MCIMetro Access Transmission Services Denver N/A
720-250 MCIMetro Access Transmission Services Denver N/A
720-251 Level 3 Communications Denver N/A
720-252 T-Mobile USA Denver N/A
720-253 T-Mobile USA Denver N/A
720-254 T-Mobile USA Denver N/A
720-255 T-Mobile USA Denver N/A
720-256 T-Mobile USA Denver N/A
720-257 MCIMetro Access Transmission Services Denver N/A
720-258 Teleport Communications America Denver N/A
720-259 Level 3 Communications Denver N/A
720-260 T-Mobile USA Denver N/A
720-261 T-Mobile USA Denver N/A
720-262 Level 3 Communications Denver N/A
720-263 Level 3 Communications Denver N/A
720-264 Qwest Corporation Denver N/A
720-265 MCIMetro Access Transmission Services Denver 5/3/2004
720-266 Level 3 Communications Denver N/A
720-267 Qwest Corporation Denver N/A
720-268 Qwest Corporation Denver N/A
720-269 Teleport Communications America Denver N/A
720-270 T-Mobile USA Denver N/A
720-271 T-Mobile USA Denver N/A
720-272 New Cingular Wireless PCS Denver 1/18/2001
720-273 New Cingular Wireless PCS Denver 1/18/2001
720-274 Paetec Itel Denver N/A
720-275 New Cingular Wireless PCS Denver 2/22/2001
720-276 New Cingular Wireless PCS Denver 2/22/2001
720-277 Level 3 Communications Denver N/A
720-278 Level 3 Telecom Of Colorado Denver 1/25/2001
720-279 Level 3 Telecom Of Colorado Denver 1/25/2001
720-280 T-Mobile USA Denver N/A
720-281 Cellco Partnership Denver N/A
720-282 Level 3 Telecom Of Colorado Denver 1/25/2001
720-283 Qwest Corporation Denver N/A
720-284 MCIMetro Access Transmission Services Denver N/A
720-285 Xo Colorado Denver 1/30/2009
720-286 Teleport Communications America Denver 4/30/2002
720-287 Comcast IP Phone Denver 4/30/2010
720-288 Bandwidth.com Clec Denver 2/26/2010
720-289 New Cingular Wireless PCS Denver 7/25/2001
720-290 T-Mobile USA Denver N/A
720-291 T-Mobile USA Denver N/A
720-292 New Cingular Wireless PCS Denver 3/4/2009
720-293 MCIMetro Access Transmission Services Denver N/A
720-294 MCIMetro Access Transmission Services Denver N/A
720-295 Bandwidth.com Clec Denver 3/1/2010
720-296 New Cingular Wireless PCS Denver 1/12/2001
720-297 New Cingular Wireless PCS Denver 1/12/2001
720-298 New Cingular Wireless PCS Denver 1/12/2001
720-299 T-Mobile USA Denver N/A
720-300-XXXX --- 720-399-XXXX
NPANXX Carrier1 Area Served2 Date3
720-300 T-Mobile USA Denver N/A
720-301 T-Mobile USA Denver N/A
720-302 Teleport Communications America Denver N/A
720-303 Bandwidth.com Clec Denver 02/13/2024
720-304 Qwest Corporation Denver N/A
720-305 Level 3 Telecom Of Colorado Denver 1/29/2001
720-306 Electric Lightwave Denver 1/29/2001
720-307 AT&T Allenspark-Lyons 8/2/2012
720-308 New Cingular Wireless PCS Denver 8/14/2001
720-309 New Cingular Wireless PCS Denver 12/5/2001
720-310 Teleport Communications America Allenspark-Lyons N/A
720-312 T-Mobile USA Denver 2/20/2001
720-313 T-Mobile USA Denver 2/20/2001
720-314 T-Mobile USA Denver 2/20/2001
720-315 Onvoy Denver 10/14/2009
720-316 Bandwidth.com Clec Denver 5/24/2010
720-317 T-Mobile USA Denver N/A
720-318 T-Mobile USA Denver N/A
720-319 T-Mobile USA Denver 4/19/2001
720-320 New Cingular Wireless PCS Denver N/A
720-321 Qwest Corporation Denver 5/29/2008
720-322 Qwest Corporation Denver N/A
720-323 T-Mobile USA Denver N/A
720-324 Comcast IP Phone Denver N/A
720-325 T-Mobile USA Denver 8/6/2010
720-326 New Cingular Wireless PCS Denver 6/13/2011
720-327 New Cingular Wireless PCS Denver 10/18/2001
720-328 Comcast IP Phone Denver 10/20/2009
720-329 New Cingular Wireless PCS Denver 10/18/2001
720-330 Level 3 Communications Denver N/A
720-331 T-Mobile USA Denver N/A
720-332 MCIMetro Access Transmission Services Denver N/A
720-333 T-Mobile USA Denver 5/14/2001
720-334 T-Mobile USA Denver 5/14/2001
720-335 T-Mobile USA Denver 5/14/2001
720-336 Bandwidth.com Clec Keenesburg 7/19/2010
720-337 Qwest Corporation Denver 2/18/2009
720-338 New Cingular Wireless PCS Denver 11/19/2001
720-339 T-Mobile USA Denver N/A
720-340 Cellco Partnership Longmont 9/4/2009
720-341 T-Mobile USA Denver N/A
720-342 Teleport Communications America Denver 4/15/2009
720-343 Level 3 Communications Denver 10/31/2003
720-344 Qwest Corporation Denver N/A
720-345 Zippytech Denver 12/28/2007
720-346 Cellco Partnership Denver N/A
720-347 Level 3 Telecom Of Colorado Denver 9/28/2009
720-348 Qwest Corporation Denver N/A
720-349 Teleport Communications America Denver 3/28/2011
720-350 T-Mobile USA Denver N/A
720-351 T-Mobile USA Denver N/A
720-352 T-Mobile USA Denver N/A
720-353 T-Mobile USA Denver N/A
720-354 Level 3 Telecom Of Colorado Denver 6/30/2011
720-355 Cellco Partnership Denver 8/16/2012
720-356 Teleport Communications America Denver N/A
720-357 New Cingular Wireless PCS Denver 7/5/2012
720-358 MCIMetro Access Transmission Services Hudson 9/9/2009
720-359 Qwest Corporation Denver N/A
720-360 New Cingular Wireless PCS Denver 1/28/2013
720-361 Electric Lightwave Denver 7/3/2013
720-362 Qwest Corporation Denver 6/6/2007
720-363 MetroPCS Denver N/A
720-364 New Cingular Wireless PCS Denver 1/15/2002
720-365 New Cingular Wireless PCS Denver 1/15/2002
720-366 New Cingular Wireless PCS Denver 1/15/2002
720-367 MCIMetro Access Transmission Services Denver N/A
720-368 MCIMetro Access Transmission Services Denver 4/30/2004
720-369 New Cingular Wireless PCS Denver 3/14/2011
720-370 Bandwidth.com Clec Denver 1/4/2013
720-371 T-Mobile USA Denver N/A
720-372 T-Mobile USA Denver 9/9/2013
720-373 T-Mobile USA Denver N/A
720-374 Qwest Corporation Denver N/A
720-375 Commnet Wireless Denver 7/10/2007
720-376 Electric Lightwave Denver 11/12/2012
720-377 MCIMetro Access Transmission Services Denver N/A
720-378 New Cingular Wireless PCS Longmont 1/19/2010
720-379 Level 3 Communications Denver N/A
720-380 T-Mobile USA Denver 2/1/2013
720-381 Comcast IP Phone Denver 8/3/2005
720-382 Electric Lightwave Denver N/A
720-383 Cellco Partnership Fort Lupton 11/13/2008
720-384 MCIMetro Access Transmission Services Denver N/A
720-385 MCIMetro Access Transmission Services Denver N/A
720-386 Bandwidth.com Clec Georgetown 12/3/2012
720-387 Level 3 Telecom Of Colorado Denver 9/4/2012
720-388 Cellco Partnership Denver 1/11/2010
720-389 MCIMetro Access Transmission Services Denver 11/17/2008
720-390 Cellco Partnership Denver 7/18/2013
720-391 Cellco Partnership Denver 7/12/2013
720-392 Cellco Partnership Deer Trail 1/30/2009
720-393 Level 3 Telecom Of Colorado Denver 6/7/2010
720-394 T-Mobile USA Denver N/A
720-395 AT&T Denver 9/4/2009
720-396 AT&T Denver 9/8/2009
720-397 AT&T Denver 9/8/2009
720-398 New Cingular Wireless PCS Denver 6/28/2010
720-399 Level 3 Communications Denver 5/6/2011
720-400-XXXX --- 720-499-XXXX
NPANXX Carrier1 Area Served2 Date3
720-400 T-Mobile USA Denver 10/28/2010
720-401 T-Mobile USA Denver 1/13/2009
720-402 Electric Lightwave Denver 5/10/2011
720-403 Peerless Network Of Colorado Denver 7/25/2013
720-404 New Cingular Wireless PCS Denver 10/18/2001
720-405 Intrado Communications Denver 8/30/2013
720-406 Qwest Corporation Denver N/A
720-407 Onvoy Denver N/A
720-408 Bandwidth.com Clec Denver 11/15/2012
720-409 Paetec Itel Denver 11/22/2011
720-410 Comcast IP Phone Denver 6/27/2014
720-412 New Cingular Wireless PCS Denver 6/28/2010
720-413 Cellco Partnership Denver 8/27/2008
720-414 Level 3 Communications Allenspark-Lyons 10/4/2011
720-415 Cellco Partnership Denver 6/12/2013
720-416 MetroPCS Denver 6/30/2014
720-417 Electric Lightwave Denver 8/18/2014
720-418 MCIMetro Access Transmission Services Denver 3/12/2014
720-419 T-Mobile USA Denver 3/16/2016
720-420 Level 3 Communications Denver 5/26/2010
720-421 T-Mobile USA Denver 3/20/2009
720-422 New Cingular Wireless PCS Denver 9/26/2001
720-423 Qwest Corporation Denver 4/22/2004
720-424 Qwest Corporation Denver 4/22/2004
720-425 Cellco Partnership Denver 1/15/2008
720-426 Qwest Corporation Denver 4/20/2010
720-427 T-Mobile USA Denver 2/4/2002
720-428 Onvoy Denver 12/12/2011
720-429 New Cingular Wireless PCS Denver 7/2/2008
720-430 AT&T Denver 6/28/2012
720-431 New Cingular Wireless PCS Denver 9/22/2010
720-432 Bandwidth.com Clec Denver 2/26/2010
720-433 Qwest Corporation Denver N/A
720-434 New Cingular Wireless PCS Denver N/A
720-435 New Cingular Wireless PCS Denver N/A
720-436 New Cingular Wireless PCS Denver N/A
720-437 Cellco Partnership Denver 2/8/2011
720-438 Onvoy Longmont 9/26/2006
720-439 New Cingular Wireless PCS Denver 4/21/2010
720-440 New Cingular Wireless PCS Denver 5/12/2010
720-441 Bandwidth.com Clec Denver 5/18/2011
720-442 Bandwidth.com Clec Longmont 4/4/2011
720-443 Bandwidth.com Clec Denver 10/7/2010
720-444 Qwest Corporation Denver N/A
720-445 Cellco Partnership Denver 9/15/2010
720-446 MCIMetro Access Transmission Services Denver 2/23/2011
720-447 New Cingular Wireless PCS Denver 2/22/2008
720-448 New Cingular Wireless PCS Denver 4/9/2008
720-449 MCIMetro Access Transmission Services Denver N/A
720-450 MCIMetro Access Transmission Services Denver 1/8/2014
720-451 T-Mobile USA Denver 10/25/2013
720-452 Peerless Network Of Colorado Denver 12/28/2010
720-453 T-Mobile USA Longmont N/A
720-454 Paetec Itel Denver 8/11/2010
720-455 Qwest Corporation Denver 7/2/2010
720-456 Level 3 Telecom Of Colorado Denver 7/23/2013
720-457 Level 3 Communications Denver N/A
720-458 Level 3 Telecom Of Colorado Denver 9/27/2010
720-459 Onvoy Denver 10/15/2010
720-460 Electric Lightwave Denver 11/13/2013
720-461 MetroPCS Denver 12/22/2015
720-462 MCIMetro Access Transmission Services Denver 11/23/2016
720-463 Onvoy Deckers 2/5/2013
720-464 Bandwidth.com Clec Denver 4/21/2011
720-465 New Cingular Wireless PCS Denver 1/3/2012
720-466 New Cingular Wireless PCS Fort Lupton 6/28/2010
720-467 Cellco Partnership Denver 1/10/2014
720-468 Level 3 Communications Denver 12/17/2001
720-469 New Cingular Wireless PCS Denver 9/23/2011
720-470 Cellco Partnership Denver N/A
720-471 Cellco Partnership Denver 6/12/2014
720-472 Teleport Communications America Denver N/A
720-473 Onvoy Denver N/A
720-474 T-Mobile USA Denver 10/31/2011
720-475 Teleport Communications America Denver N/A
720-476 New Cingular Wireless PCS Denver 5/19/2014
720-477 Onvoy Denver 8/9/2011
720-478 Level 3 Telecom Of Colorado Denver 5/8/2013
720-479 Teleport Communications America Denver N/A
720-480 New Cingular Wireless PCS Denver N/A
720-481 New Cingular Wireless PCS Denver 8/15/2014
720-482 Qwest Corporation Denver N/A
720-483 New Cingular Wireless PCS Denver 8/4/2014
720-484 Electric Lightwave Denver 7/18/2011
720-485 Comcast IP Phone Denver 5/8/2014
720-486 New Cingular Wireless PCS Denver 8/18/2014
720-487 Telnyx Longmont 12/9/2016
720-488 Qwest Corporation Denver N/A
720-489 Qwest Corporation Denver N/A
720-490 T-Mobile USA Denver N/A
720-491 New Cingular Wireless PCS Longmont 11/16/2011
720-492 T-Mobile USA Denver 8/25/2014
720-493 Qwest Corporation Denver N/A
720-494 Qwest Corporation Longmont N/A
720-495 New Cingular Wireless PCS Denver 9/28/2001
720-496 Level 3 Communications Denver 12/17/2001
720-497 Qwest Corporation Denver N/A
720-498 Cellco Partnership Denver 9/10/2012
720-499 T-Mobile USA Denver 8/9/2011
720-500-XXXX --- 720-599-XXXX
NPANXX Carrier1 Area Served2 Date3
720-500 Peerless Network Of Colorado Denver 10/7/2014
720-501 MetroPCS Denver 8/28/2014
720-502 Comcast IP Phone Denver 11/15/2012
720-503 New Cingular Wireless PCS Denver 10/2/2014
720-504 Bandwidth.com Clec Denver 5/24/2013
720-505 Cellco Partnership Denver 1/11/2011
720-506 Level 3 Communications Denver 12/17/2001
720-507 Bandwidth.com Clec Denver 10/30/2014
720-508 Electric Lightwave Denver 6/26/2012
720-509 MCIMetro Access Transmission Services Denver 4/2/2010
720-510 Comcast IP Phone Denver 6/13/2017
720-512 Comcast IP Phone Denver 5/9/2016
720-513 Onvoy Denver 8/25/2017
720-514 Teleport Communications America Denver N/A
720-515 Bandwidth.com Clec Denver 2/11/2010
720-516 Qwest Corporation Denver 7/21/2017
720-517 New Cingular Wireless PCS Denver 6/30/2015
720-518 Electric Lightwave Denver 5/16/2014
720-519 Teleport Communications America Denver N/A
720-520 Onvoy Spectrum Denver 5/13/2016
720-521 American Messaging Services Denver N/A
720-522 MCIMetro Access Transmission Services Denver 11/19/2010
720-523 Qwest Corporation Denver 5/24/2010
720-524 Qwest Corporation Denver N/A
720-525 T-Mobile USA Denver 4/2/2013
720-526 New Cingular Wireless PCS Longmont 6/12/2014
720-527 Teliax Denver 10/27/2017
720-528 Qwest Corporation Denver N/A
720-529 Qwest Corporation Denver N/A
720-530 New Cingular Wireless PCS Denver N/A
720-531 Comcast IP Phone Denver 8/16/2016
720-532 Teleport Communications America Denver N/A
720-533 Teleport Communications America Denver N/A
720-534 Vonage America Longmont 8/31/2016
720-535 Teleport Communications America Denver N/A
720-536 Qwest Corporation Denver N/A
720-537 Fasttrack Communications Denver 10/22/2014
720-538 Cellco Partnership Fort Lupton 9/24/2012
720-539 New Cingular Wireless PCS Denver 7/8/2011
720-540 Qwest Corporation Denver N/A
720-541 Cellco Partnership Denver 9/28/2012
720-542 Qwest Corporation Denver N/A
720-543 Peerless Network Of Colorado Denver 10/14/2016
720-544 Qwest Corporation Denver N/A
720-545 Level 3 Communications Denver 6/12/2009
720-546 T-Mobile USA Denver 8/23/2016
720-547 Bandwidth.com Clec Keenesburg 3/30/2018
720-548 Level 3 Communications Denver N/A
720-549 Level 3 Communications Denver N/A
720-550 Paetec Itel Denver 6/25/2013
720-551 New Cingular Wireless PCS Denver 4/1/2011
720-552 Cellco Partnership Longmont 11/16/2012
720-553 Qwest Corporation Denver 6/22/2012
720-554 Qwest Corporation Denver N/A
720-556 Cellco Partnership Denver 5/10/2011
720-557 Cellco Partnership Denver 6/12/2013
720-558 Qwest Corporation Denver 3/13/2002
720-559 Teleport Communications America Denver N/A
720-560 New Cingular Wireless PCS Denver N/A
720-561 Qwest Corporation Denver 4/18/2008
720-562 Qwest Corporation Denver N/A
720-563 Qwest Corporation Denver N/A
720-564 Qwest Corporation Denver N/A
720-565 Qwest Corporation Denver N/A
720-566 Qwest Corporation Denver N/A
720-567 Level 3 Communications Denver N/A
720-568 Qwest Corporation Denver 2/27/2001
720-569 New Cingular Wireless PCS Denver 10/8/2008
720-570 Qwest Corporation Denver N/A
720-571 Onvoy Allenspark-Lyons 3/1/2016
720-572 Teleport Communications America Denver 12/14/2016
720-573 Level 3 Telecom Of Colorado Denver 10/17/2014
720-574 Bandwidth.com Clec Denver 6/29/2018
720-575 Onvoy Denver 11/11/2014
720-576 Cellco Partnership Denver 11/9/2016
720-577 Level 3 Communications Denver 7/3/2014
720-578 Qwest Corporation Denver N/A
720-579 MCIMetro Access Transmission Services Denver N/A
720-580 Bandwidth.com Clec Keenesburg 3/15/2013
720-581 T-Mobile USA Denver N/A
720-582 Cellco Partnership Denver 11/12/2015
720-583 Onvoy Denver 9/30/2010
720-584 Cellco Partnership Denver 10/21/2014
720-585 T-Mobile USA Denver 11/2/2012
720-586 MetroPCS Denver 5/25/2017
720-587 Teleport Communications America Denver N/A
720-588 Nuso Denver 10/17/2012
720-589 T-Mobile USA Denver 4/30/2013
720-590 Onvoy Denver 2/5/2013
720-591 Cellco Partnership Denver 9/15/2016
720-592 T-Mobile USA Denver 12/8/2016
720-593 Level 3 Telecom Of Colorado Denver 4/2/2014
720-594 Airus Denver 6/30/2017
720-595 Level 3 Communications Denver 5/10/2016
720-596 Teleport Communications America Denver N/A
720-597 Cellco Partnership Longmont 1/11/2016
720-598 Bandwidth.com Clec Denver 2/26/2015
720-599 Electric Lightwave Denver 2/13/2012
720-600-XXXX --- 720-699-XXXX
NPANXX Carrier1 Area Served2 Date3
720-600 Onvoy Longmont 12/20/2012
720-601 Cellco Partnership Denver 12/21/2017
720-602 T-Mobile USA Denver 7/31/2017
720-603 Level 3 Telecom Of Colorado Denver 9/1/2017
720-604 Bandwidth.com Clec Strasburg N/A
720-605 Onvoy Denver 11/17/2015
720-606 New Cingular Wireless PCS Fort Lupton 8/12/2011
720-607 Cellco Partnership Denver 3/16/2017
720-608 Bandwidth.com Clec Georgetown 7/19/2010
720-609 New Cingular Wireless PCS Denver 6/3/2014
720-610 Cellco Partnership Denver 7/30/2018
720-612 T-Mobile USA Denver 7/22/2011
720-613 MCIMetro Access Transmission Services Hudson 3/1/2013
720-614 Airespring Denver 10/4/2018
720-615 Bandwidth.com Clec Keenesburg 8/17/2020
720-616 Level 3 Communications Denver 8/29/2014
720-617 Paetec Itel Denver 4/18/2019
720-618 Cellco Partnership Denver 7/10/2014
720-619 Bandwidth.com Clec Georgetown 3/25/2014
720-620 New Cingular Wireless PCS Denver 3/27/2002
720-621 New Cingular Wireless PCS Denver 3/27/2002
720-622 Qwest Corporation Denver N/A
720-623 Onvoy Denver 2/17/2012
720-624 Teleport Communications America Denver N/A
720-625 Paetec Itel Denver 9/20/2011
720-626 Cellco Partnership Denver 1/11/2011
720-627 Qwest Corporation Denver 3/6/2012
720-628 New Cingular Wireless PCS Denver 3/4/2002
720-629 New Cingular Wireless PCS Denver 3/4/2002
720-630 New Cingular Wireless PCS Denver 10/23/2013
720-631 MCIMetro Access Transmission Services Denver 4/3/2017
720-632 Teleport Communications America Denver 1/11/2018
720-633 New Cingular Wireless PCS Denver 12/28/2010
720-634 MCIMetro Access Transmission Services Denver 11/16/2012
720-635 New Cingular Wireless PCS Denver N/A
720-636 Cellco Partnership Denver 11/13/2013
720-637 Onvoy Denver 10/21/2021
720-638 Comcast IP Phone Denver 1/17/2013
720-639 Onvoy Denver 5/14/2014
720-640 Level 3 Communications Hudson 1/28/2019
720-641 T-Mobile USA Denver N/A
720-642 Cellco Partnership Denver 10/22/2015
720-643 Level 3 Communications Denver 8/24/2015
720-644 Paetec Itel Denver 4/1/2011
720-645 T-Mobile USA Denver 3/5/2014
720-646 New Cingular Wireless PCS Denver 10/7/2015
720-647 Onvoy Denver 5/20/2019
720-648 Cellco Partnership Denver 5/10/2011
720-649 Bandwidth.com Clec Georgetown 8/30/2018
720-650 Onvoy Denver 8/17/2017
720-651 Cellco Partnership Denver 10/15/2015
720-652 Qwest Corporation Longmont N/A
720-653 Cellco Partnership Denver 6/3/2019
720-654 New Cingular Wireless PCS Denver 1/10/2022
720-655 T-Mobile USA Denver 8/30/2021
720-656 New Cingular Wireless PCS Denver 10/7/2015
720-657 Bandwidth.com Clec Denver 2/25/2019
720-658 Telstar Communications Inc Denver 3/26/2010
720-659 Vonage America Denver 7/15/2022
720-660 Cellco Partnership Denver 4/8/2014
720-661 Cellco Partnership Denver 12/24/2018
720-662 T-Mobile USA Denver 9/30/2014
720-663 Bandwidth.com Clec Denver 5/28/2008
720-664 Onvoy Allenspark-Lyons 8/16/2019
720-665 Cellco Partnership Denver 8/30/2017
720-666 Peerless Network Of Colorado Denver 5/23/2012
720-667 Comcast IP Phone Denver 11/21/2017
720-668 Cellco Partnership Denver 10/16/2014
720-669 Onvoy Hudson 12/12/2014
720-670 Cellco Partnership Denver N/A
720-671 Cellco Partnership Denver 4/25/2019
720-672 Cellco Partnership Denver 9/30/2019
720-673 Exiant Communications Denver 8/23/2019
720-674 Comcast IP Phone Denver 2/20/2020
720-675 New Cingular Wireless PCS Denver 5/12/2009
720-676 MCIMetro Access Transmission Services Denver 8/29/2016
720-677 Onvoy Denver 6/20/2019
720-678 Csc Wireless Denver 10/9/2019
720-679 Onvoy Georgetown 8/16/2019
720-680 T-Mobile USA Longmont 6/4/2020
720-681 T-Mobile USA Denver 4/9/2019
720-682 Cellco Partnership Denver 10/22/2018
720-683 Bandwidth.com Clec Fort Lupton 5/15/2013
720-684 Level 3 Communications Longmont N/A
720-685 Qwest Corporation Denver N/A
720-686 MCIMetro Access Transmission Services Denver 10/14/2010
720-687 T-Mobile USA Denver 11/19/2019
720-688 New Cingular Wireless PCS Denver 7/15/2015
720-689 Bandwidth.com Clec Denver 4/4/2011
720-690 New Cingular Wireless PCS Denver 3/27/2002
720-691 T-Mobile USA Denver 6/25/2019
720-692 MetroPCS Denver 5/27/2015
720-693 Cellco Partnership Denver 1/11/2017
720-694 T-Mobile USA Denver 3/24/2020
720-695 MCIMetro Access Transmission Services Denver 8/12/2014
720-696 Bandwidth.com Clec Denver 6/1/2015
720-697 Centurylink Communications Denver 11/9/2015
720-698 Cellco Partnership Longmont 3/15/2022
720-699 Onvoy Denver 11/11/2014
720-701-XXXX --- 720-799-XXXX
NPANXX Carrier1 Area Served2 Date3
720-701 Teleport Communications America Denver 4/16/2019
720-702 Onvoy Keenesburg 3/27/2020
720-703 Nuso Denver 6/19/2020
720-704 T-Mobile USA Denver 3/31/2020
720-705 New Cingular Wireless PCS Denver 10/2/2014
720-706 Onvoy Denver 7/13/2020
720-707 Onvoy Denver 11/21/2014
720-708 Teliax Denver 8/12/2011
720-709 Paetec Itel Denver 8/21/2014
720-710 Onvoy Denver 9/7/2016
720-712 Bandwidth.com Clec Fort Lupton 6/20/2019
720-713 Onvoy Longmont 8/16/2019
720-714 Onvoy Longmont 8/24/2020
720-715 Bandwidth.com Clec Deckers 2/8/2019
720-716 Level 3 Communications Denver 3/25/2020
720-717 New Cingular Wireless PCS Denver 3/3/2015
720-718 Qwest Corporation Longmont 12/19/2016
720-719 Bandwidth.com Clec Denver 04/03/2024
720-720 New Cingular Wireless PCS Denver 09/03/2024
720-721 The Voice Application Network Denver N/A
720-722 Centurylink Communications Denver 5/21/2010
720-723 Electric Lightwave Denver 2/4/2013
720-724 Electric Lightwave Denver 4/2/2013
720-725 T-Mobile USA Denver 6/10/2015
720-726 Comcast IP Phone Denver 10/29/2013
720-727 Bandwidth.com Clec Longmont 6/12/2018
720-728 Level 3 Telecom Of Colorado Denver 12/16/2015
720-729 Bandwidth.com Clec Keenesburg 3/2/2012
720-730 Onvoy Denver 9/20/2018
720-731 Level 3 Communications Longmont 1/4/2019
720-732 T-Mobile USA Denver N/A
720-733 Qwest Corporation Denver N/A
720-734 Commnet Wireless Denver 5/11/2020
720-735 Onvoy Keenesburg 10/28/2014
720-736 Onvoy Denver 1/21/2021
720-737 Cellco Partnership Denver 12/13/2012
720-738 Onvoy Denver 4/29/2019
720-739 Bandwidth.com Clec Denver 4/29/2014
720-740 HD Carrier Deckers 8/29/2019
720-741 Onvoy Georgetown 8/19/2020
720-742 T-Mobile USA Denver 9/11/2020
720-743 Bandwidth.com Clec Longmont 9/21/2020
720-744 Qwest Corporation Denver N/A
720-745 Level 3 Communications Longmont 4/17/2015
720-746 Qwest Corporation Denver N/A
720-747 Qwest Corporation Denver N/A
720-748 Qwest Corporation Denver N/A
720-749 Peerless Network Of Colorado Denver 9/25/2015
720-750 T-Mobile USA Denver 1/28/2019
720-751 T-Mobile USA Denver 1/9/2020
720-752 Level 3 Communications Denver 8/17/2020
720-753 New Cingular Wireless PCS Fort Lupton 12/1/2015
720-754 Level 3 Telecom Of Colorado Denver 3/30/2010
720-755 T-Mobile USA Denver 9/1/2015
720-756 T-Mobile USA Denver 11/24/2020
720-757 T-Mobile USA Denver 9/30/2014
720-758 Centurylink Communications Denver 12/20/2016
720-759 Pacoptic Networks Longmont 8/10/2016
720-760 Twilio International Denver 10/15/2020
720-761 T-Mobile USA Denver 10/5/2020
720-762 Cellco Partnership Denver 7/18/2019
720-763 New Cingular Wireless PCS Denver 11/5/2009
720-764 Onvoy Hudson 10/23/2020
720-765 Cellco Partnership Denver 9/29/2017
720-766 Fractel Denver 1/25/2019
720-767 T-Mobile USA Denver 7/14/2014
720-768 Commio Denver 11/14/2017
720-769 Vonage America Denver 9/3/2020
720-770 Bandwidth.com Clec Deckers 9/30/2014
720-771 T-Mobile USA Denver N/A
720-772 Electric Lightwave Denver 10/15/2014
720-773 MCIMetro Access Transmission Services Denver 2/9/2015
720-774 New Cingular Wireless PCS Denver 6/4/2015
720-775 New Cingular Wireless PCS Denver 10/14/2009
720-776 Peerless Network Of Colorado Deckers 2/14/2019
720-777 Qwest Corporation Denver 2/9/2006
720-778 Bandwidth.com Clec Denver 9/30/2014
720-779 Bandwidth.com Clec Denver 6/12/2019
720-780 Onvoy Denver 12/16/2019
720-781 T-Mobile USA Longmont 11/24/2020
720-782 AT&T Hudson 7/2/2019
720-783 Onvoy Denver 8/5/2022
720-784 Onvoy Georgetown 12/31/2020
720-785 Teleport Communications America Denver N/A
720-786 T-Mobile USA Denver 8/12/2022
720-787 Pacoptic Networks Denver 8/23/2016
720-788 Cellco Partnership Denver 1/6/2017
720-789 Level 3 Communications Denver 8/5/2011
720-790 Onvoy Allenspark-Lyons 8/18/2020
720-791 Telnyx Georgetown 3/16/2017
720-792 Onvoy Denver 11/9/2020
720-793 Cellco Partnership Denver 11/13/2018
720-794 Onvoy Allenspark-Lyons 1/15/2021
720-795 Centurylink Communications Denver 6/21/2017
720-796 Nuso Georgetown 12/11/2020
720-797 Bandwidth.com Clec Keenesburg 5/22/2019
720-798 Bandwidth.com Clec Denver 4/21/2020
720-799 Onvoy Denver 3/13/2015
720-800-XXXX --- 720-899-XXXX
NPANXX Carrier1 Area Served2 Date3
720-800 Onvoy Denver 11/8/2012
720-801 HD Carrier Georgetown 9/26/2022
720-802 Onvoy Fort Lupton 8/19/2020
720-803 T-Mobile USA Denver 1/14/2021
720-804 T-Mobile USA Longmont 3/5/2021
720-805 Voip Innovations Denver 8/15/2018
720-806 Peerless Network Of Colorado Deckers 2/24/2021
720-807 Onvoy Denver 8/27/2020
720-808 Bandwidth.com Clec Denver 10/20/2010
720-809 MetroPCS Denver 8/22/2014
720-810 Cellco Partnership Denver N/A
720-812 Cellco Partnership Denver 3/24/2020
720-813 Ip Horizon Denver 3/5/2021
720-814 Cellco Partnership Deer Trail 9/7/2021
720-815 Comcast IP Phone Longmont 9/1/2017
720-816 Onvoy Spectrum Allenspark-Lyons 03/29/2023
720-817 Comcast IP Phone Strasburg 9/24/2021
720-818 Cellco Partnership Longmont 9/1/2017
720-819 T-Mobile USA Denver 3/9/2018
720-820 Wide Voice Denver 9/28/2015
720-821 Onvoy Longmont 1/6/2021
720-822 Cellco Partnership Denver 5/12/2014
720-823 Whitesky Communications Denver 1/8/2021
720-824 Vonage America Hudson 10/20/2021
720-825 HD Carrier Denver 9/23/2022
720-826 Comcast IP Phone Denver 7/30/2019
720-827 T-Mobile USA Denver 3/22/2018
720-828 T-Mobile USA Denver 11/12/2018
720-829 MetroPCS Denver 7/29/2014
720-830 HD Carrier Denver 12/3/2018
720-831 Teleport Communications America Denver 10/25/2021
720-832 Onvoy Spectrum Hudson 03/29/2023
720-833 Qwest Corporation Denver N/A
720-834 Teleport Communications America Denver N/A
720-835 New Cingular Wireless PCS Denver 9/25/2015
720-836 Level 3 Communications Denver N/A
720-837 T-Mobile USA Denver N/A
720-838 T-Mobile USA Denver N/A
720-839 T-Mobile USA Denver N/A
720-840 T-Mobile USA Denver N/A
720-841 T-Mobile USA Denver N/A
720-842 Qwest Corporation Denver N/A
720-843 Onvoy Spectrum Denver 10/21/2021
720-844 Leap Telecom Denver 1/25/2021
720-845 T-Mobile USA Denver 8/30/2017
720-846 Cellco Partnership Deer Trail 6/22/2022
720-847 Qwest Corporation Denver 11/5/2003
720-848 Qwest Corporation Denver N/A
720-849 T-Mobile USA Denver N/A
720-850 Five9 Denver 5/27/2021
720-851 Qwest Corporation Denver N/A
720-852 Qwest Corporation Denver N/A
720-853 Bandwidth.com Clec Longmont 10/25/2021
720-854 Qwest Corporation Denver N/A
720-855 Qwest Corporation Denver N/A
720-856 Onvoy Fort Lupton 10/25/2021
720-857 Qwest Corporation Denver N/A
720-858 Qwest Corporation Denver N/A
720-859 Qwest Corporation Denver N/A
720-860 Onvoy Spectrum Denver 8/12/2022
720-861 Bandwidth.com Clec Georgetown 10/26/2021
720-862 MCIMetro Access Transmission Services Denver N/A
720-863 MCIMetro Access Transmission Services Denver N/A
720-864 Qwest Corporation Longmont N/A
720-865 Level 3 Communications Denver N/A
720-866 Terra Nova Telecom Denver 2/22/2019
720-868 Onvoy Fort Lupton 4/1/2021
720-869 New Cingular Wireless PCS Denver 10/25/2021
720-870 Qwest Corporation Denver N/A
720-871 T-Mobile USA Longmont 11/18/2021
720-872 Qwest Corporation Denver N/A
720-873 Qwest Corporation Denver N/A
720-874 Qwest Corporation Denver N/A
720-875 Qwest Corporation Denver N/A
720-876 Qwest Corporation Denver N/A
720-877 Level 3 Communications Denver N/A
720-878 New Cingular Wireless PCS Denver N/A
720-879 Level 3 Communications Denver N/A
720-880 Cellco Partnership Denver N/A
720-881 Bandwidth.com Clec Denver N/A
720-882 New Cingular Wireless PCS Denver N/A
720-883 Level 3 Communications Denver N/A
720-884 Qwest Corporation Denver N/A
720-885 New Cingular Wireless PCS Denver 2/4/2010
720-886 Qwest Corporation Denver N/A
720-887 Qwest Corporation Denver N/A
720-888 Level 3 Communications Denver N/A
720-889 MCIMetro Access Transmission Services Denver N/A
720-890 Qwest Corporation Denver N/A
720-891 Level 3 Communications Denver 12/17/2001
720-892 Bandwidth.com Clec Denver 3/20/2018
720-893 Bandwidth.com Clec Allenspark-Lyons 8/8/2014
720-894 Bandwidth.com Clec Deckers 10/25/2021
720-895 Qwest Corporation Denver N/A
720-896 T-Mobile USA Denver 11/12/2021
720-897 Level 3 Communications Denver N/A
720-898 Qwest Corporation Denver N/A
720-899 Cellco Partnership Longmont 11/10/2014
720-900-XXXX --- 720-999-XXXX
NPANXX Carrier1 Area Served2 Date3
720-900 Peerless Network Of Colorado Denver 10/7/2014
720-901 Telnyx Denver 11/17/2021
720-902 Cellco Partnership Denver 5/1/2019
720-903 Level 3 Communications Denver N/A
720-904 Qwest Corporation Denver N/A
720-905 Five9 Denver 1/26/2022
720-906 Comcast IP Phone Byers 12/3/2021
720-907 Level 3 Communications Denver N/A
720-908 Cellco Partnership Denver 5/15/2017
720-909 Bandwidth.com Clec Denver N/A
720-910 Cellco Partnership Denver 3/25/2022
720-912 Onvoy Denver 10/5/2020
720-913 Level 3 Communications Denver N/A
720-914 T-Mobile USA Fort Lupton 01/16/2024
720-915 Vonage America Allenspark-Lyons 6/24/2022
720-916 Cellco Partnership Denver 7/6/2022
720-917 Qwest Corporation Denver N/A
720-918 Vonage America Keenesburg 6/24/2022
720-919 T-Mobile USA Denver 8/23/2016
720-920 Teleport Communications America Denver N/A
720-921 Level 3 Communications Denver N/A
720-922 Qwest Corporation Denver N/A
720-923 Advanced Telecom Solutions Denver 8/22/2018
720-924 Qwest Corporation Deckers N/A
720-925 Comcast IP Phone Denver 12/18/2015
720-926 Cellco Partnership Denver 6/14/2018
720-927 Bandwidth.com Clec Longmont 3/27/2019
720-928 Bandwidth.com Clec Fort Lupton 5/15/2018
720-929 Qwest Corporation Denver N/A
720-930 Rclec Denver 8/27/2015
720-931 Qwest Corporation Denver N/A
720-932 Qwest Corporation Denver N/A
720-933 T-Mobile USA Denver N/A
720-934 T-Mobile USA Denver N/A
720-935 T-Mobile USA Denver N/A
720-936 T-Mobile USA Denver N/A
720-937 T-Mobile USA Denver N/A
720-938 T-Mobile USA Denver N/A
720-939 T-Mobile USA Denver N/A
720-940 T-Mobile USA Denver N/A
720-941 Qwest Corporation Denver N/A
720-942 Qwest Corporation Denver N/A
720-943 Level 3 Communications Denver N/A
720-944 Qwest Corporation Denver N/A
720-945 Qwest Corporation Denver N/A
720-946 Qwest Corporation Denver N/A
720-947 Qwest Corporation Denver N/A
720-948 Cellco Partnership Denver 6/22/2022
720-949 Teleport Communications America Denver N/A
720-951 Cellco Partnership Denver N/A
720-952 Vonage America Deckers 6/24/2022
720-953 T-Mobile USA Denver 7/21/2022
720-954 Cellco Partnership Fort Lupton 9/16/2022
720-955 Cellco Partnership Denver 7/9/2015
720-956 Qwest Corporation Denver N/A
720-957 T-Mobile USA Denver 1/27/2022
720-960 New Cingular Wireless PCS Denver 8/17/2022
720-961 Level 3 Communications Denver N/A
720-962 Qwest Corporation Denver N/A
720-963 Qwest Corporation Denver N/A
720-964 T-Mobile USA Longmont 9/20/2022
720-965 T-Mobile USA Denver 6/7/2013
720-966 New Cingular Wireless PCS Fort Lupton 10/2/2014
720-967 Leap Telecom Denver 9/21/2022
720-968 New Cingular Wireless PCS Denver 8/17/2022
720-969 New Cingular Wireless PCS Denver 10/18/2022
720-970 Bandwidth.com Clec Longmont 04/03/2024
720-971 T-Mobile USA Denver N/A
720-972 Qwest Corporation Denver 4/23/2002
720-973 Hadlo Technologies Denver 03/06/2023
720-974 Electric Lightwave Denver N/A
720-975 Electric Lightwave Denver N/A
720-977 Qwest Corporation Denver N/A
720-978 Nuso Denver 11/15/2022
720-979 T-Mobile USA Denver N/A
720-980 T-Mobile USA Denver N/A
720-981 Qwest Corporation Denver N/A
720-982 T-Mobile USA Denver N/A
720-983 New Cingular Wireless PCS Denver 05/25/2023
720-984 T-Mobile USA Denver N/A
720-985 T-Mobile USA Denver N/A
720-986 Bandwidth.com Clec Longmont 10/18/2022
720-987 T-Mobile USA Denver N/A
720-988 T-Mobile USA Denver N/A
720-989 T-Mobile USA Denver N/A
720-990 Level 3 Telecom Of Colorado Denver 7/21/2015
720-991 Commio Deckers 10/5/2022
720-992 Teleport Communications America Denver 1/11/2018
720-993 New Cingular Wireless PCS Denver 10/18/2022
720-994 T-Mobile USA Denver 11/23/2022
720-995 Eon Telecom Denver 12/28/2022
720-996 Commio Denver 3/15/2017
720-997 Comcast IP Phone Bennett 3/25/2022
720-998 Comcast IP Phone Denver 12/1/2006
720-999 T-Mobile USA Denver 7/22/2008
  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 720

City1 County Time Zone1
Allenspark Boulder M
Arvada Jefferson M
Aurora Adams M
Bailey Park M
Bennett Adams M
Black Hawk Gilpin M
Bond Eagle M
Boulder Boulder M
Brighton Adams M
Broomfield Broomfield M
Buffalo Creek Jefferson M
Byers Arapahoe M
Castle Rock Douglas M
Central City Gilpin M
Commerce City Adams M
Conifer Jefferson M
Dacono Weld M
Deer Trail Arapahoe M
Denver Adams M
Dumont Clear Creek M
Dupont Adams M
Eastlake Adams M
Elbert El Paso M
Eldorado Springs Boulder M
Elizabeth Elbert M
Empire Clear Creek M
Englewood Arapahoe M
Erie Weld M
Evergreen Jefferson M
Firestone Weld M
Fort Lupton Weld M
Franktown Douglas M
Frederick Weld M
Georgetown Clear Creek M
Golden Jefferson M
Grant Park M
Henderson Adams M
Hereford Weld M
Highlands Ranch Douglas M
Hudson Weld M
Hygiene Boulder M
Idaho Springs Clear Creek M
Idledale Jefferson M
Indian Hills Jefferson M
Jamestown Boulder M
Keenesburg Weld M
Kiowa Elbert M
Kittredge Jefferson M
Lafayette Boulder M
Lakewood Jefferson M
Larkspur Douglas M
Littleton Arapahoe M
Longmont Boulder M
Louisville Boulder M
Louviers Douglas M
Lyons Boulder M
Morrison Jefferson M
Nederland Boulder M
Niwot Boulder M
Parker Douglas M
Pine Jefferson M
Pinecliffe Boulder M
Roggen Weld M
Rollinsville Gilpin M
Sedalia Douglas M
Sedgwick Sedgwick M
Shawnee Park M
Silver Plume Clear Creek M
Strasburg Adams M
Thornton Adams M
Ward Boulder M
Watkins Adams M
Westminster Adams M
Wheat Ridge Jefferson M
  1. Listed above are most places served by USA area code 720. 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. M stands for Mountain Time (currently ).
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