Area Code 720
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 .
For exact NPA boundaries see official 720 area code map
Phone number lookup
More Colorado area codes:
Locate any 720-NXX prefix:
| NPANXX | Area Served1 | Date1 |
|---|---|---|
| 720-200 | Denver | N/A |
| 720-201 | Denver | N/A |
| 720-202 | Denver | 10/7/2009 |
| 720-203 | Denver | 1/29/2001 |
| 720-204 | Longmont | N/A |
| 720-205 | Denver | N/A |
| 720-206 | Denver | N/A |
| 720-207 | Denver | N/A |
| 720-208 | Denver | N/A |
| 720-209 | Denver | N/A |
| 720-210 | Denver | N/A |
| 720-212 | Denver | N/A |
| 720-213 | Denver | N/A |
| 720-214 | Denver | N/A |
| 720-215 | Denver | 10/12/2009 |
| 720-216 | Denver | 1/29/2001 |
| 720-217 | Denver | N/A |
| 720-218 | Denver | N/A |
| 720-219 | Denver | N/A |
| 720-220 | Denver | N/A |
| 720-221 | Denver | N/A |
| 720-222 | Denver | N/A |
| 720-223 | Denver | N/A |
| 720-224 | Denver | N/A |
| 720-225 | Denver | N/A |
| 720-226 | Denver | N/A |
| 720-227 | Denver | N/A |
| 720-228 | Denver | N/A |
| 720-229 | Denver | N/A |
| 720-230 | Denver | N/A |
| 720-231 | Denver | N/A |
| 720-232 | Denver | N/A |
| 720-233 | Denver | N/A |
| 720-234 | Denver | N/A |
| 720-235 | Denver | N/A |
| 720-236 | Denver | N/A |
| 720-237 | Denver | 9/28/2009 |
| 720-238 | Denver | N/A |
| 720-239 | Denver | N/A |
| 720-240 | Denver | N/A |
| 720-241 | Denver | N/A |
| 720-242 | Denver | 10/9/2008 |
| 720-243 | Denver | 6/30/2009 |
| 720-244 | Denver | N/A |
| 720-245 | Denver | 11/21/2011 |
| 720-246 | Denver | N/A |
| 720-247 | Denver | 5/20/2004 |
| 720-248 | Denver | N/A |
| 720-249 | Denver | N/A |
| 720-250 | Denver | N/A |
| 720-251 | Denver | N/A |
| 720-252 | Denver | N/A |
| 720-253 | Denver | N/A |
| 720-254 | Denver | N/A |
| 720-255 | Denver | N/A |
| 720-256 | Denver | N/A |
| 720-257 | Denver | N/A |
| 720-258 | Denver | N/A |
| 720-259 | Denver | N/A |
| 720-260 | Denver | N/A |
| 720-261 | Denver | N/A |
| 720-262 | Denver | N/A |
| 720-263 | Denver | N/A |
| 720-264 | Denver | N/A |
| 720-265 | Denver | 5/3/2004 |
| 720-266 | Denver | N/A |
| 720-267 | Denver | N/A |
| 720-268 | Denver | N/A |
| 720-269 | Denver | N/A |
| 720-270 | Denver | N/A |
| 720-271 | Denver | N/A |
| 720-272 | Denver | 1/18/2001 |
| 720-273 | Denver | 1/18/2001 |
| 720-274 | Denver | N/A |
| 720-275 | Denver | 2/22/2001 |
| 720-276 | Denver | 2/22/2001 |
| 720-277 | Denver | N/A |
| 720-278 | Denver | 1/25/2001 |
| 720-279 | Denver | 1/25/2001 |
| 720-280 | Denver | N/A |
| 720-281 | Denver | N/A |
| 720-282 | Denver | 1/25/2001 |
| 720-283 | Denver | N/A |
| 720-284 | Denver | N/A |
| 720-285 | Denver | 1/30/2009 |
| 720-286 | Denver | 4/30/2002 |
| 720-287 | Denver | 4/30/2010 |
| 720-288 | Denver | 2/26/2010 |
| 720-289 | Denver | 7/25/2001 |
| 720-290 | Denver | N/A |
| 720-291 | Denver | N/A |
| 720-292 | Denver | 3/4/2009 |
| 720-293 | Denver | N/A |
| 720-294 | Denver | N/A |
| 720-295 | Denver | 3/1/2010 |
| 720-296 | Denver | 1/12/2001 |
| 720-297 | Denver | 1/12/2001 |
| 720-298 | Denver | 1/12/2001 |
| 720-299 | Denver | N/A |
| NPANXX | Area Served1 | Date1 |
|---|---|---|
| 720-300 | Denver | N/A |
| 720-301 | Denver | N/A |
| 720-302 | Denver | N/A |
| 720-303 | Denver | 02/13/2024 |
| 720-304 | Denver | N/A |
| 720-305 | Denver | 1/29/2001 |
| 720-306 | Denver | 1/29/2001 |
| 720-307 | Allenspark/ Lyons | 8/2/2012 |
| 720-308 | Denver | 8/14/2001 |
| 720-309 | Denver | 12/5/2001 |
| 720-310 | Allenspark/ Lyons | N/A |
| 720-312 | Denver | 2/20/2001 |
| 720-313 | Denver | 2/20/2001 |
| 720-314 | Denver | 2/20/2001 |
| 720-315 | Denver | 10/14/2009 |
| 720-316 | Denver | 5/24/2010 |
| 720-317 | Denver | N/A |
| 720-318 | Denver | N/A |
| 720-319 | Denver | 4/19/2001 |
| 720-320 | Denver | N/A |
| 720-321 | Denver | 5/29/2008 |
| 720-322 | Denver | N/A |
| 720-323 | Denver | N/A |
| 720-324 | Denver | N/A |
| 720-325 | Denver | 8/6/2010 |
| 720-326 | Denver | 6/13/2011 |
| 720-327 | Denver | 10/18/2001 |
| 720-328 | Denver | 10/20/2009 |
| 720-329 | Denver | 10/18/2001 |
| 720-330 | Denver | N/A |
| 720-331 | Denver | N/A |
| 720-332 | Denver | N/A |
| 720-333 | Denver | 5/14/2001 |
| 720-334 | Denver | 5/14/2001 |
| 720-335 | Denver | 5/14/2001 |
| 720-336 | Keenesburg | 7/19/2010 |
| 720-337 | Denver | 2/18/2009 |
| 720-338 | Denver | 11/19/2001 |
| 720-339 | Denver | N/A |
| 720-340 | Longmont | 9/4/2009 |
| 720-341 | Denver | N/A |
| 720-342 | Denver | 4/15/2009 |
| 720-343 | Denver | 10/31/2003 |
| 720-344 | Denver | N/A |
| 720-345 | Denver | 12/28/2007 |
| 720-346 | Denver | N/A |
| 720-347 | Denver | 9/28/2009 |
| 720-348 | Denver | N/A |
| 720-349 | Denver | 3/28/2011 |
| 720-350 | Denver | N/A |
| 720-351 | Denver | N/A |
| 720-352 | Denver | N/A |
| 720-353 | Denver | N/A |
| 720-354 | Denver | 6/30/2011 |
| 720-355 | Denver | 8/16/2012 |
| 720-356 | Denver | N/A |
| 720-357 | Denver | 7/5/2012 |
| 720-358 | Hudson | 9/9/2009 |
| 720-359 | Denver | N/A |
| 720-360 | Denver | 1/28/2013 |
| 720-361 | Denver | 7/3/2013 |
| 720-362 | Denver | 6/6/2007 |
| 720-363 | Denver | N/A |
| 720-364 | Denver | 1/15/2002 |
| 720-365 | Denver | 1/15/2002 |
| 720-366 | Denver | 1/15/2002 |
| 720-367 | Denver | N/A |
| 720-368 | Denver | 4/30/2004 |
| 720-369 | Denver | 3/14/2011 |
| 720-370 | Denver | 1/4/2013 |
| 720-371 | Denver | N/A |
| 720-372 | Denver | 9/9/2013 |
| 720-373 | Denver | N/A |
| 720-374 | Denver | N/A |
| 720-375 | Denver | 7/10/2007 |
| 720-376 | Denver | 11/12/2012 |
| 720-377 | Denver | N/A |
| 720-378 | Longmont | 1/19/2010 |
| 720-379 | Denver | N/A |
| 720-380 | Denver | 2/1/2013 |
| 720-381 | Denver | 8/3/2005 |
| 720-382 | Denver | N/A |
| 720-383 | Fort Lupton | 11/13/2008 |
| 720-384 | Denver | N/A |
| 720-385 | Denver | N/A |
| 720-386 | Georgetown | 12/3/2012 |
| 720-387 | Denver | 9/4/2012 |
| 720-388 | Denver | 1/11/2010 |
| 720-389 | Denver | 11/17/2008 |
| 720-390 | Denver | 7/18/2013 |
| 720-391 | Denver | 7/12/2013 |
| 720-392 | Deer Trail | 1/30/2009 |
| 720-393 | Denver | 6/7/2010 |
| 720-394 | Denver | N/A |
| 720-395 | Denver | 9/4/2009 |
| 720-396 | Denver | 9/8/2009 |
| 720-397 | Denver | 9/8/2009 |
| 720-398 | Denver | 6/28/2010 |
| 720-399 | Denver | 5/6/2011 |
| NPANXX | Area Served1 | Date1 |
|---|---|---|
| 720-400 | Denver | 10/28/2010 |
| 720-401 | Denver | 1/13/2009 |
| 720-402 | Denver | 5/10/2011 |
| 720-403 | Denver | 7/25/2013 |
| 720-404 | Denver | 10/18/2001 |
| 720-405 | Denver | 8/30/2013 |
| 720-406 | Denver | N/A |
| 720-407 | Denver | N/A |
| 720-408 | Denver | 11/15/2012 |
| 720-409 | Denver | 11/22/2011 |
| 720-410 | Denver | 6/27/2014 |
| 720-412 | Denver | 6/28/2010 |
| 720-413 | Denver | 8/27/2008 |
| 720-414 | Allenspark/ Lyons | 10/4/2011 |
| 720-415 | Denver | 6/12/2013 |
| 720-416 | Denver | 6/30/2014 |
| 720-417 | Denver | 8/18/2014 |
| 720-418 | Denver | 3/12/2014 |
| 720-419 | Denver | 3/16/2016 |
| 720-420 | Denver | 5/26/2010 |
| 720-421 | Denver | 3/20/2009 |
| 720-422 | Denver | 9/26/2001 |
| 720-423 | Denver | 4/22/2004 |
| 720-424 | Denver | 4/22/2004 |
| 720-425 | Denver | 1/15/2008 |
| 720-426 | Denver | 4/20/2010 |
| 720-427 | Denver | 2/4/2002 |
| 720-428 | Denver | 12/12/2011 |
| 720-429 | Denver | 7/2/2008 |
| 720-430 | Denver | 6/28/2012 |
| 720-431 | Denver | 9/22/2010 |
| 720-432 | Denver | 2/26/2010 |
| 720-433 | Denver | N/A |
| 720-434 | Denver | N/A |
| 720-435 | Denver | N/A |
| 720-436 | Denver | N/A |
| 720-437 | Denver | 2/8/2011 |
| 720-438 | Longmont | 9/26/2006 |
| 720-439 | Denver | 4/21/2010 |
| 720-440 | Denver | 5/12/2010 |
| 720-441 | Denver | 5/18/2011 |
| 720-442 | Longmont | 4/4/2011 |
| 720-443 | Denver | 10/7/2010 |
| 720-444 | Denver | N/A |
| 720-445 | Denver | 9/15/2010 |
| 720-446 | Denver | 2/23/2011 |
| 720-447 | Denver | 2/22/2008 |
| 720-448 | Denver | 4/9/2008 |
| 720-449 | Denver | N/A |
| 720-450 | Denver | 1/8/2014 |
| 720-451 | Denver | 10/25/2013 |
| 720-452 | Denver | 12/28/2010 |
| 720-453 | Longmont | N/A |
| 720-454 | Denver | 8/11/2010 |
| 720-455 | Denver | 7/2/2010 |
| 720-456 | Denver | 7/23/2013 |
| 720-457 | Denver | N/A |
| 720-458 | Denver | 9/27/2010 |
| 720-459 | Denver | 10/15/2010 |
| 720-460 | Denver | 11/13/2013 |
| 720-461 | Denver | 12/22/2015 |
| 720-462 | Denver | 11/23/2016 |
| 720-463 | Deckers | 2/5/2013 |
| 720-464 | Denver | 4/21/2011 |
| 720-465 | Denver | 1/3/2012 |
| 720-466 | Fort Lupton | 6/28/2010 |
| 720-467 | Denver | 1/10/2014 |
| 720-468 | Denver | 12/17/2001 |
| 720-469 | Denver | 9/23/2011 |
| 720-470 | Denver | N/A |
| 720-471 | Denver | 6/12/2014 |
| 720-472 | Denver | N/A |
| 720-473 | Denver | N/A |
| 720-474 | Denver | 10/31/2011 |
| 720-475 | Denver | N/A |
| 720-476 | Denver | 5/19/2014 |
| 720-477 | Denver | 8/9/2011 |
| 720-478 | Denver | 5/8/2013 |
| 720-479 | Denver | N/A |
| 720-480 | Denver | N/A |
| 720-481 | Denver | 8/15/2014 |
| 720-482 | Denver | N/A |
| 720-483 | Denver | 8/4/2014 |
| 720-484 | Denver | 7/18/2011 |
| 720-485 | Denver | 5/8/2014 |
| 720-486 | Denver | 8/18/2014 |
| 720-487 | Longmont | 12/9/2016 |
| 720-488 | Denver | N/A |
| 720-489 | Denver | N/A |
| 720-490 | Denver | N/A |
| 720-491 | Longmont | 11/16/2011 |
| 720-492 | Denver | 8/25/2014 |
| 720-493 | Denver | N/A |
| 720-494 | Longmont | N/A |
| 720-495 | Denver | 9/28/2001 |
| 720-496 | Denver | 12/17/2001 |
| 720-497 | Denver | N/A |
| 720-498 | Denver | 9/10/2012 |
| 720-499 | Denver | 8/9/2011 |
| NPANXX | Area Served1 | Date1 |
|---|---|---|
| 720-500 | Denver | 10/7/2014 |
| 720-501 | Denver | 8/28/2014 |
| 720-502 | Denver | 11/15/2012 |
| 720-503 | Denver | 10/2/2014 |
| 720-504 | Denver | 5/24/2013 |
| 720-505 | Denver | 1/11/2011 |
| 720-506 | Denver | 12/17/2001 |
| 720-507 | Denver | 10/30/2014 |
| 720-508 | Denver | 6/26/2012 |
| 720-509 | Denver | 4/2/2010 |
| 720-510 | Denver | 6/13/2017 |
| 720-512 | Denver | 5/9/2016 |
| 720-513 | Denver | 8/25/2017 |
| 720-514 | Denver | N/A |
| 720-515 | Denver | 2/11/2010 |
| 720-516 | Denver | 7/21/2017 |
| 720-517 | Denver | 6/30/2015 |
| 720-518 | Denver | 5/16/2014 |
| 720-519 | Denver | N/A |
| 720-520 | Denver | 5/13/2016 |
| 720-521 | Denver | N/A |
| 720-522 | Denver | 11/19/2010 |
| 720-523 | Denver | 5/24/2010 |
| 720-524 | Denver | N/A |
| 720-525 | Denver | 4/2/2013 |
| 720-526 | Longmont | 6/12/2014 |
| 720-527 | Denver | 10/27/2017 |
| 720-528 | Denver | N/A |
| 720-529 | Denver | N/A |
| 720-530 | Denver | N/A |
| 720-531 | Denver | 8/16/2016 |
| 720-532 | Denver | N/A |
| 720-533 | Denver | N/A |
| 720-534 | Longmont | 8/31/2016 |
| 720-535 | Denver | N/A |
| 720-536 | Denver | N/A |
| 720-537 | Denver | 10/22/2014 |
| 720-538 | Fort Lupton | 9/24/2012 |
| 720-539 | Denver | 7/8/2011 |
| 720-540 | Denver | N/A |
| 720-541 | Denver | 9/28/2012 |
| 720-542 | Denver | N/A |
| 720-543 | Denver | 10/14/2016 |
| 720-544 | Denver | N/A |
| 720-545 | Denver | 6/12/2009 |
| 720-546 | Denver | 8/23/2016 |
| 720-547 | Keenesburg | 3/30/2018 |
| 720-548 | Denver | N/A |
| 720-549 | Denver | N/A |
| 720-550 | Denver | 6/25/2013 |
| 720-551 | Denver | 4/1/2011 |
| 720-552 | Longmont | 11/16/2012 |
| 720-553 | Denver | 6/22/2012 |
| 720-554 | Denver | N/A |
| 720-556 | Denver | 5/10/2011 |
| 720-557 | Denver | 6/12/2013 |
| 720-558 | Denver | 3/13/2002 |
| 720-559 | Denver | N/A |
| 720-560 | Denver | N/A |
| 720-561 | Denver | 4/18/2008 |
| 720-562 | Denver | N/A |
| 720-563 | Denver | N/A |
| 720-564 | Denver | N/A |
| 720-565 | Denver | N/A |
| 720-566 | Denver | N/A |
| 720-567 | Denver | N/A |
| 720-568 | Denver | 2/27/2001 |
| 720-569 | Denver | 10/8/2008 |
| 720-570 | Denver | N/A |
| 720-571 | Allenspark/ Lyons | 3/1/2016 |
| 720-572 | Denver | 12/14/2016 |
| 720-573 | Denver | 10/17/2014 |
| 720-574 | Denver | 6/29/2018 |
| 720-575 | Denver | 11/11/2014 |
| 720-576 | Denver | 11/9/2016 |
| 720-577 | Denver | 7/3/2014 |
| 720-578 | Denver | N/A |
| 720-579 | Denver | N/A |
| 720-580 | Keenesburg | 3/15/2013 |
| 720-581 | Denver | N/A |
| 720-582 | Denver | 11/12/2015 |
| 720-583 | Denver | 9/30/2010 |
| 720-584 | Denver | 10/21/2014 |
| 720-585 | Denver | 11/2/2012 |
| 720-586 | Denver | 5/25/2017 |
| 720-587 | Denver | N/A |
| 720-588 | Denver | 10/17/2012 |
| 720-589 | Denver | 4/30/2013 |
| 720-590 | Denver | 2/5/2013 |
| 720-591 | Denver | 9/15/2016 |
| 720-592 | Denver | 12/8/2016 |
| 720-593 | Denver | 4/2/2014 |
| 720-594 | Denver | 6/30/2017 |
| 720-595 | Denver | 5/10/2016 |
| 720-596 | Denver | N/A |
| 720-597 | Longmont | 1/11/2016 |
| 720-598 | Denver | 2/26/2015 |
| 720-599 | Denver | 2/13/2012 |
| NPANXX | Area Served1 | Date1 |
|---|---|---|
| 720-600 | Longmont | 12/20/2012 |
| 720-601 | Denver | 12/21/2017 |
| 720-602 | Denver | 7/31/2017 |
| 720-603 | Denver | 9/1/2017 |
| 720-604 | Strasburg | N/A |
| 720-605 | Denver | 11/17/2015 |
| 720-606 | Fort Lupton | 8/12/2011 |
| 720-607 | Denver | 3/16/2017 |
| 720-608 | Georgetown | 7/19/2010 |
| 720-609 | Denver | 6/3/2014 |
| 720-610 | Denver | 7/30/2018 |
| 720-612 | Denver | 7/22/2011 |
| 720-613 | Hudson | 3/1/2013 |
| 720-614 | Denver | 10/4/2018 |
| 720-615 | Keenesburg | 8/17/2020 |
| 720-616 | Denver | 8/29/2014 |
| 720-617 | Denver | 4/18/2019 |
| 720-618 | Denver | 7/10/2014 |
| 720-619 | Georgetown | 3/25/2014 |
| 720-620 | Denver | 3/27/2002 |
| 720-621 | Denver | 3/27/2002 |
| 720-622 | Denver | N/A |
| 720-623 | Denver | 2/17/2012 |
| 720-624 | Denver | N/A |
| 720-625 | Denver | 9/20/2011 |
| 720-626 | Denver | 1/11/2011 |
| 720-627 | Denver | 3/6/2012 |
| 720-628 | Denver | 3/4/2002 |
| 720-629 | Denver | 3/4/2002 |
| 720-630 | Denver | 10/23/2013 |
| 720-631 | Denver | 4/3/2017 |
| 720-632 | Denver | 1/11/2018 |
| 720-633 | Denver | 12/28/2010 |
| 720-634 | Denver | 11/16/2012 |
| 720-635 | Denver | N/A |
| 720-636 | Denver | 11/13/2013 |
| 720-637 | Denver | 10/21/2021 |
| 720-638 | Denver | 1/17/2013 |
| 720-639 | Denver | 5/14/2014 |
| 720-640 | Hudson | 1/28/2019 |
| 720-641 | Denver | N/A |
| 720-642 | Denver | 10/22/2015 |
| 720-643 | Denver | 8/24/2015 |
| 720-644 | Denver | 4/1/2011 |
| 720-645 | Denver | 3/5/2014 |
| 720-646 | Denver | 10/7/2015 |
| 720-647 | Denver | 5/20/2019 |
| 720-648 | Denver | 5/10/2011 |
| 720-649 | Georgetown | 8/30/2018 |
| 720-650 | Denver | 8/17/2017 |
| 720-651 | Denver | 10/15/2015 |
| 720-652 | Longmont | N/A |
| 720-653 | Denver | 6/3/2019 |
| 720-654 | Denver | 1/10/2022 |
| 720-655 | Denver | 8/30/2021 |
| 720-656 | Denver | 10/7/2015 |
| 720-657 | Denver | 2/25/2019 |
| 720-658 | Denver | 3/26/2010 |
| 720-659 | Denver | 7/15/2022 |
| 720-660 | Denver | 4/8/2014 |
| 720-661 | Denver | 12/24/2018 |
| 720-662 | Denver | 9/30/2014 |
| 720-663 | Denver | 5/28/2008 |
| 720-664 | Allenspark/ Lyons | 8/16/2019 |
| 720-665 | Denver | 8/30/2017 |
| 720-666 | Denver | 5/23/2012 |
| 720-667 | Denver | 11/21/2017 |
| 720-668 | Denver | 10/16/2014 |
| 720-669 | Hudson | 12/12/2014 |
| 720-670 | Denver | N/A |
| 720-671 | Denver | 4/25/2019 |
| 720-672 | Denver | 9/30/2019 |
| 720-673 | Denver | 8/23/2019 |
| 720-674 | Denver | 2/20/2020 |
| 720-675 | Denver | 5/12/2009 |
| 720-676 | Denver | 8/29/2016 |
| 720-677 | Denver | 6/20/2019 |
| 720-678 | Denver | 10/9/2019 |
| 720-679 | Georgetown | 8/16/2019 |
| 720-680 | Longmont | 6/4/2020 |
| 720-681 | Denver | 4/9/2019 |
| 720-682 | Denver | 10/22/2018 |
| 720-683 | Fort Lupton | 5/15/2013 |
| 720-684 | Longmont | N/A |
| 720-685 | Denver | N/A |
| 720-686 | Denver | 10/14/2010 |
| 720-687 | Denver | 11/19/2019 |
| 720-688 | Denver | 7/15/2015 |
| 720-689 | Denver | 4/4/2011 |
| 720-690 | Denver | 3/27/2002 |
| 720-691 | Denver | 6/25/2019 |
| 720-692 | Denver | 5/27/2015 |
| 720-693 | Denver | 1/11/2017 |
| 720-694 | Denver | 3/24/2020 |
| 720-695 | Denver | 8/12/2014 |
| 720-696 | Denver | 6/1/2015 |
| 720-697 | Denver | 11/9/2015 |
| 720-698 | Longmont | 3/15/2022 |
| 720-699 | Denver | 11/11/2014 |
| NPANXX | Area Served1 | Date1 |
|---|---|---|
| 720-701 | Denver | 4/16/2019 |
| 720-702 | Keenesburg | 3/27/2020 |
| 720-703 | Denver | 6/19/2020 |
| 720-704 | Denver | 3/31/2020 |
| 720-705 | Denver | 10/2/2014 |
| 720-706 | Denver | 7/13/2020 |
| 720-707 | Denver | 11/21/2014 |
| 720-708 | Denver | 8/12/2011 |
| 720-709 | Denver | 8/21/2014 |
| 720-710 | Denver | 9/7/2016 |
| 720-712 | Fort Lupton | 6/20/2019 |
| 720-713 | Longmont | 8/16/2019 |
| 720-714 | Longmont | 8/24/2020 |
| 720-715 | Deckers | 2/8/2019 |
| 720-716 | Denver | 3/25/2020 |
| 720-717 | Denver | 3/3/2015 |
| 720-718 | Longmont | 12/19/2016 |
| 720-719 | Denver | 04/03/2024 |
| 720-720 | Denver | 09/03/2024 |
| 720-721 | Denver | N/A |
| 720-722 | Denver | 5/21/2010 |
| 720-723 | Denver | 2/4/2013 |
| 720-724 | Denver | 4/2/2013 |
| 720-725 | Denver | 6/10/2015 |
| 720-726 | Denver | 10/29/2013 |
| 720-727 | Longmont | 6/12/2018 |
| 720-728 | Denver | 12/16/2015 |
| 720-729 | Keenesburg | 3/2/2012 |
| 720-730 | Denver | 9/20/2018 |
| 720-731 | Longmont | 1/4/2019 |
| 720-732 | Denver | N/A |
| 720-733 | Denver | N/A |
| 720-734 | Denver | 5/11/2020 |
| 720-735 | Keenesburg | 10/28/2014 |
| 720-736 | Denver | 1/21/2021 |
| 720-737 | Denver | 12/13/2012 |
| 720-738 | Denver | 4/29/2019 |
| 720-739 | Denver | 4/29/2014 |
| 720-740 | Deckers | 8/29/2019 |
| 720-741 | Georgetown | 8/19/2020 |
| 720-742 | Denver | 9/11/2020 |
| 720-743 | Longmont | 9/21/2020 |
| 720-744 | Denver | N/A |
| 720-745 | Longmont | 4/17/2015 |
| 720-746 | Denver | N/A |
| 720-747 | Denver | N/A |
| 720-748 | Denver | N/A |
| 720-749 | Denver | 9/25/2015 |
| 720-750 | Denver | 1/28/2019 |
| 720-751 | Denver | 1/9/2020 |
| 720-752 | Denver | 8/17/2020 |
| 720-753 | Fort Lupton | 12/1/2015 |
| 720-754 | Denver | 3/30/2010 |
| 720-755 | Denver | 9/1/2015 |
| 720-756 | Denver | 11/24/2020 |
| 720-757 | Denver | 9/30/2014 |
| 720-758 | Denver | 12/20/2016 |
| 720-759 | Longmont | 8/10/2016 |
| 720-760 | Denver | 10/15/2020 |
| 720-761 | Denver | 10/5/2020 |
| 720-762 | Denver | 7/18/2019 |
| 720-763 | Denver | 11/5/2009 |
| 720-764 | Hudson | 10/23/2020 |
| 720-765 | Denver | 9/29/2017 |
| 720-766 | Denver | 1/25/2019 |
| 720-767 | Denver | 7/14/2014 |
| 720-768 | Denver | 11/14/2017 |
| 720-769 | Denver | 9/3/2020 |
| 720-770 | Deckers | 9/30/2014 |
| 720-771 | Denver | N/A |
| 720-772 | Denver | 10/15/2014 |
| 720-773 | Denver | 2/9/2015 |
| 720-774 | Denver | 6/4/2015 |
| 720-775 | Denver | 10/14/2009 |
| 720-776 | Deckers | 2/14/2019 |
| 720-777 | Denver | 2/9/2006 |
| 720-778 | Denver | 9/30/2014 |
| 720-779 | Denver | 6/12/2019 |
| 720-780 | Denver | 12/16/2019 |
| 720-781 | Longmont | 11/24/2020 |
| 720-782 | Hudson | 7/2/2019 |
| 720-783 | Denver | 8/5/2022 |
| 720-784 | Georgetown | 12/31/2020 |
| 720-785 | Denver | N/A |
| 720-786 | Denver | 8/12/2022 |
| 720-787 | Denver | 8/23/2016 |
| 720-788 | Denver | 1/6/2017 |
| 720-789 | Denver | 8/5/2011 |
| 720-790 | Allenspark/ Lyons | 8/18/2020 |
| 720-791 | Georgetown | 3/16/2017 |
| 720-792 | Denver | 11/9/2020 |
| 720-793 | Denver | 11/13/2018 |
| 720-794 | Allenspark/ Lyons | 1/15/2021 |
| 720-795 | Denver | 6/21/2017 |
| 720-796 | Georgetown | 12/11/2020 |
| 720-797 | Keenesburg | 5/22/2019 |
| 720-798 | Denver | 4/21/2020 |
| 720-799 | Denver | 3/13/2015 |
| NPANXX | Area Served1 | Date1 |
|---|---|---|
| 720-800 | Denver | 11/8/2012 |
| 720-801 | Georgetown | 9/26/2022 |
| 720-802 | Fort Lupton | 8/19/2020 |
| 720-803 | Denver | 1/14/2021 |
| 720-804 | Longmont | 3/5/2021 |
| 720-805 | Denver | 8/15/2018 |
| 720-806 | Deckers | 2/24/2021 |
| 720-807 | Denver | 8/27/2020 |
| 720-808 | Denver | 10/20/2010 |
| 720-809 | Denver | 8/22/2014 |
| 720-810 | Denver | N/A |
| 720-812 | Denver | 3/24/2020 |
| 720-813 | Denver | 3/5/2021 |
| 720-814 | Deer Trail | 9/7/2021 |
| 720-815 | Longmont | 9/1/2017 |
| 720-816 | Allenspark/ Lyons | 03/29/2023 |
| 720-817 | Strasburg | 9/24/2021 |
| 720-818 | Longmont | 9/1/2017 |
| 720-819 | Denver | 3/9/2018 |
| 720-820 | Denver | 9/28/2015 |
| 720-821 | Longmont | 1/6/2021 |
| 720-822 | Denver | 5/12/2014 |
| 720-823 | Denver | 1/8/2021 |
| 720-824 | Hudson | 10/20/2021 |
| 720-825 | Denver | 9/23/2022 |
| 720-826 | Denver | 7/30/2019 |
| 720-827 | Denver | 3/22/2018 |
| 720-828 | Denver | 11/12/2018 |
| 720-829 | Denver | 7/29/2014 |
| 720-830 | Denver | 12/3/2018 |
| 720-831 | Denver | 10/25/2021 |
| 720-832 | Hudson | 03/29/2023 |
| 720-833 | Denver | N/A |
| 720-834 | Denver | N/A |
| 720-835 | Denver | 9/25/2015 |
| 720-836 | Denver | N/A |
| 720-837 | Denver | N/A |
| 720-838 | Denver | N/A |
| 720-839 | Denver | N/A |
| 720-840 | Denver | N/A |
| 720-841 | Denver | N/A |
| 720-842 | Denver | N/A |
| 720-843 | Denver | 10/21/2021 |
| 720-844 | Denver | 1/25/2021 |
| 720-845 | Denver | 8/30/2017 |
| 720-846 | Deer Trail | 6/22/2022 |
| 720-847 | Denver | 11/5/2003 |
| 720-848 | Denver | N/A |
| 720-849 | Denver | N/A |
| 720-850 | Denver | 5/27/2021 |
| 720-851 | Denver | N/A |
| 720-852 | Denver | N/A |
| 720-853 | Longmont | 10/25/2021 |
| 720-854 | Denver | N/A |
| 720-855 | Denver | N/A |
| 720-856 | Fort Lupton | 10/25/2021 |
| 720-857 | Denver | N/A |
| 720-858 | Denver | N/A |
| 720-859 | Denver | N/A |
| 720-860 | Denver | 8/12/2022 |
| 720-861 | Georgetown | 10/26/2021 |
| 720-862 | Denver | N/A |
| 720-863 | Denver | N/A |
| 720-864 | Longmont | N/A |
| 720-865 | Denver | N/A |
| 720-866 | Denver | 2/22/2019 |
| 720-868 | Fort Lupton | 4/1/2021 |
| 720-869 | Denver | 10/25/2021 |
| 720-870 | Denver | N/A |
| 720-871 | Longmont | 11/18/2021 |
| 720-872 | Denver | N/A |
| 720-873 | Denver | N/A |
| 720-874 | Denver | N/A |
| 720-875 | Denver | N/A |
| 720-876 | Denver | N/A |
| 720-877 | Denver | N/A |
| 720-878 | Denver | N/A |
| 720-879 | Denver | N/A |
| 720-880 | Denver | N/A |
| 720-881 | Denver | N/A |
| 720-882 | Denver | N/A |
| 720-883 | Denver | N/A |
| 720-884 | Denver | N/A |
| 720-885 | Denver | 2/4/2010 |
| 720-886 | Denver | N/A |
| 720-887 | Denver | N/A |
| 720-888 | Denver | N/A |
| 720-889 | Denver | N/A |
| 720-890 | Denver | N/A |
| 720-891 | Denver | 12/17/2001 |
| 720-892 | Denver | 3/20/2018 |
| 720-893 | Allenspark/ Lyons | 8/8/2014 |
| 720-894 | Deckers | 10/25/2021 |
| 720-895 | Denver | N/A |
| 720-896 | Denver | 11/12/2021 |
| 720-897 | Denver | N/A |
| 720-898 | Denver | N/A |
| 720-899 | Longmont | 11/10/2014 |
| NPANXX | Area Served1 | Date1 |
|---|---|---|
| 720-900 | Denver | 10/7/2014 |
| 720-901 | Denver | 11/17/2021 |
| 720-902 | Denver | 5/1/2019 |
| 720-903 | Denver | N/A |
| 720-904 | Denver | N/A |
| 720-905 | Denver | 1/26/2022 |
| 720-906 | Byers | 12/3/2021 |
| 720-907 | Denver | N/A |
| 720-908 | Denver | 5/15/2017 |
| 720-909 | Denver | N/A |
| 720-910 | Denver | 3/25/2022 |
| 720-912 | Denver | 10/5/2020 |
| 720-913 | Denver | N/A |
| 720-914 | Fort Lupton | 01/16/2024 |
| 720-915 | Allenspark/ Lyons | 6/24/2022 |
| 720-916 | Denver | 7/6/2022 |
| 720-917 | Denver | N/A |
| 720-918 | Keenesburg | 6/24/2022 |
| 720-919 | Denver | 8/23/2016 |
| 720-920 | Denver | N/A |
| 720-921 | Denver | N/A |
| 720-922 | Denver | N/A |
| 720-923 | Denver | 8/22/2018 |
| 720-924 | Deckers | N/A |
| 720-925 | Denver | 12/18/2015 |
| 720-926 | Denver | 6/14/2018 |
| 720-927 | Longmont | 3/27/2019 |
| 720-928 | Fort Lupton | 5/15/2018 |
| 720-929 | Denver | N/A |
| 720-930 | Denver | 8/27/2015 |
| 720-931 | Denver | N/A |
| 720-932 | Denver | N/A |
| 720-933 | Denver | N/A |
| 720-934 | Denver | N/A |
| 720-935 | Denver | N/A |
| 720-936 | Denver | N/A |
| 720-937 | Denver | N/A |
| 720-938 | Denver | N/A |
| 720-939 | Denver | N/A |
| 720-940 | Denver | N/A |
| 720-941 | Denver | N/A |
| 720-942 | Denver | N/A |
| 720-943 | Denver | N/A |
| 720-944 | Denver | N/A |
| 720-945 | Denver | N/A |
| 720-946 | Denver | N/A |
| 720-947 | Denver | N/A |
| 720-948 | Denver | 6/22/2022 |
| 720-949 | Denver | N/A |
| 720-951 | Denver | N/A |
| 720-952 | Deckers | 6/24/2022 |
| 720-953 | Denver | 7/21/2022 |
| 720-954 | Fort Lupton | 9/16/2022 |
| 720-955 | Denver | 7/9/2015 |
| 720-956 | Denver | N/A |
| 720-957 | Denver | 1/27/2022 |
| 720-960 | Denver | 8/17/2022 |
| 720-961 | Denver | N/A |
| 720-962 | Denver | N/A |
| 720-963 | Denver | N/A |
| 720-964 | Longmont | 9/20/2022 |
| 720-965 | Denver | 6/7/2013 |
| 720-966 | Fort Lupton | 10/2/2014 |
| 720-967 | Denver | 9/21/2022 |
| 720-968 | Denver | 8/17/2022 |
| 720-969 | Denver | 10/18/2022 |
| 720-970 | Longmont | 04/03/2024 |
| 720-971 | Denver | N/A |
| 720-972 | Denver | 4/23/2002 |
| 720-973 | Denver | 03/06/2023 |
| 720-974 | Denver | N/A |
| 720-975 | Denver | N/A |
| 720-977 | Denver | N/A |
| 720-978 | Denver | 11/15/2022 |
| 720-979 | Denver | N/A |
| 720-980 | Denver | N/A |
| 720-981 | Denver | N/A |
| 720-982 | Denver | N/A |
| 720-983 | Denver | 05/25/2023 |
| 720-984 | Denver | N/A |
| 720-985 | Denver | N/A |
| 720-986 | Longmont | 10/18/2022 |
| 720-987 | Denver | N/A |
| 720-988 | Denver | N/A |
| 720-989 | Denver | N/A |
| 720-990 | Denver | 7/21/2015 |
| 720-991 | Deckers | 10/5/2022 |
| 720-992 | Denver | 1/11/2018 |
| 720-993 | Denver | 10/18/2022 |
| 720-994 | Denver | 11/23/2022 |
| 720-995 | Denver | 12/28/2022 |
| 720-996 | Denver | 3/15/2017 |
| 720-997 | Bennett | 3/25/2022 |
| 720-998 | Denver | 12/1/2006 |
| 720-999 | Denver | 7/22/2008 |
- 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.
- Assignment date. N/A - mostly central office codes assigned before 2001.
- NXX prefixes last updated: June 3, 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 |
- 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.
- M stands for Mountain Time (currently ).