Verified Nov 1, 2026 · Source: NANPA CO Code Assignment Records
Area code 720 prefixes
785 of the 786 possible NXX blocks are assigned in area code 720 (99.9% of capacity), spread across 12 rate centers and 45 holders. The largest holders are T-MOBILE USA, INC. (132 blocks, 16.8%), QWEST CORPORATION (103 blocks, 13.1%), NEW CINGULAR WIRELESS PCS, LLC (92 blocks, 11.7%). Grouped by brand, Lumen accounts for 170 blocks; brand-attributable holders cover 96% of the code, and the rest are CLECs, VoIP wholesalers and regional carriers that trade under their own names. The assignment records here run from 2001-01-12 to 2024-09-03, with 54 blocks handed out in 2014 alone. 653 blocks (83%) are in thousands-block pooling, meaning the block is shared between carriers in 1,000-number lots rather than held whole – which is why a single NXX can serve several carriers at once. 540 were growth assignments – additional blocks to a carrier that had already filled its earlier ones.
785 assigned blocks of 786
12 rate centers
45 holders of record
83% in thousands-block pooling
Largest holders in 720
| Holder of record, as NANPA names it | Brand | Blocks | Share |
|---|---|---|---|
| T-MOBILE USA, INC. | T-Mobile | 132 | 16.8% |
| QWEST CORPORATION | Lumen | 103 | 13.1% |
| NEW CINGULAR WIRELESS PCS, LLC | AT&T | 92 | 11.7% |
| CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | Verizon | 75 | 9.6% |
| ONVOY, LLC - CO | Onvoy | 55 | 7% |
| BANDWIDTH.COM CLEC, LLC - CO | Bandwidth | 55 | 7% |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC | Verizon | 51 | 6.5% |
| LEVEL 3 COMMUNICATIONS, LLC - CO | Lumen | 48 | 6.1% |
| TELEPORT COMMUNICATIONS AMERICA, LLC - CO | AT&T | 31 | 3.9% |
| COMCAST IP PHONE, LLC | Comcast | 21 | 2.7% |
| ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM | Allstream | 17 | 2.2% |
| LEVEL 3 TELECOM OF COLORADO, LLC - CO | Lumen | 15 | 1.9% |
Names are printed as they appear in the assignment records, which is the legal entity rather than the brand. Holding a block is not the same as serving the numbers in it: portability moves numbers between carriers and pooling splits a block between several.
Rate centers with their own page
Rate centers where at least three blocks are assigned, excluding the numbered metro zone codes. The remainder are in the full table below.
All 785 assigned blocks
One row per NXX. “Pooled” means carriers draw 1,000-number lots from the block rather than holding all 10,000, so a pooled prefix can belong to several carriers at once. “Not in service” means assigned but not yet open for calls – a caller ID from one of those is necessarily spoofed. The holder column gives the brand where the legal entity maps to one; the full legal names are in the holders table above, exactly as NANPA records them.
| Prefix | Holder of record | Rate center | Assigned | Pooled | In service |
|---|---|---|---|---|---|
| 720-200 | Lumen | DENVER | – | – | yes |
| 720-201 | AT&T | DENVER | – | – | yes |
| 720-202 | Verizon | DENVER | 2009-10-07 | yes | yes |
| 720-203 | T-Mobile | DENVER | 2001-01-29 | yes | yes |
| 720-204 | Lumen | LONGMONT | – | yes | yes |
| 720-205 | T-Mobile | DENVER | – | yes | yes |
| 720-206 | Verizon | DENVER | – | yes | yes |
| 720-207 | Verizon | DENVER | – | yes | yes |
| 720-208 | Verizon | DENVER | – | yes | yes |
| 720-209 | T-Mobile | DENVER | – | yes | yes |
| 720-210 | Verizon | DENVER | – | yes | yes |
| 720-212 | Verizon | DENVER | – | yes | yes |
| 720-213 | Windstream | DENVER | – | yes | yes |
| 720-214 | Windstream | DENVER | – | – | yes |
| 720-215 | Verizon | DENVER | 2009-10-12 | yes | yes |
| 720-216 | AT&T | DENVER | 2001-01-29 | yes | yes |
| 720-217 | T-Mobile | DENVER | – | – | yes |
| 720-218 | T-Mobile | DENVER | – | yes | yes |
| 720-219 | Verizon | DENVER | – | yes | yes |
| 720-220 | T-Mobile | DENVER | – | – | yes |
| 720-221 | Verizon | DENVER | – | – | yes |
| 720-222 | Verizon | DENVER | – | – | yes |
| 720-223 | Verizon | DENVER | – | yes | yes |
| 720-224 | Verizon | DENVER | – | yes | yes |
| 720-225 | Verizon | DENVER | – | yes | yes |
| 720-226 | Verizon | DENVER | – | yes | yes |
| 720-227 | Verizon | DENVER | – | yes | yes |
| 720-228 | Verizon | DENVER | – | – | yes |
| 720-229 | Verizon | DENVER | – | yes | yes |
| 720-230 | XO COLORADO, LLC | DENVER | – | yes | yes |
| 720-231 | T-Mobile | DENVER | – | – | yes |
| 720-232 | T-Mobile | DENVER | – | yes | yes |
| 720-233 | T-Mobile | DENVER | – | yes | yes |
| 720-234 | T-Mobile | DENVER | – | yes | yes |
| 720-235 | T-Mobile | DENVER | – | yes | yes |
| 720-236 | T-Mobile | DENVER | – | yes | yes |
| 720-237 | AT&T | DENVER | 2009-09-28 | yes | yes |
| 720-238 | T-Mobile | DENVER | – | yes | yes |
| 720-239 | AT&T | DENVER | – | yes | yes |
| 720-240 | Verizon | DENVER | – | yes | yes |
| 720-241 | Verizon | DENVER | – | yes | yes |
| 720-242 | Lumen | DENVER | 2008-10-09 | yes | yes |
| 720-243 | AT&T | DENVER | 2009-06-30 | yes | yes |
| 720-244 | AT&T | DENVER | – | – | yes |
| 720-245 | Allstream | DENVER | 2011-11-21 | yes | yes |
| 720-246 | Verizon | DENVER | – | yes | yes |
| 720-247 | Verizon | DENVER | 2004-05-20 | yes | yes |
| 720-248 | Onvoy | DENVER | – | yes | yes |
| 720-249 | Verizon | DENVER | – | yes | yes |
| 720-250 | Verizon | DENVER | – | yes | yes |
| 720-251 | Lumen | DENVER | – | yes | yes |
| 720-252 | T-Mobile | DENVER | – | yes | yes |
| 720-253 | T-Mobile | DENVER | – | yes | yes |
| 720-254 | T-Mobile | DENVER | – | yes | yes |
| 720-255 | T-Mobile | DENVER | – | yes | yes |
| 720-256 | T-Mobile | DENVER | – | yes | yes |
| 720-257 | Verizon | DENVER | – | yes | yes |
| 720-258 | AT&T | DENVER | – | yes | yes |
| 720-259 | Lumen | DENVER | – | yes | yes |
| 720-260 | T-Mobile | DENVER | – | yes | yes |
| 720-261 | T-Mobile | DENVER | – | – | yes |
| 720-262 | Lumen | DENVER | – | yes | yes |
| 720-263 | Lumen | DENVER | – | yes | yes |
| 720-264 | Lumen | DENVER | – | – | yes |
| 720-265 | Verizon | DENVER | 2004-05-03 | yes | yes |
| 720-266 | Lumen | DENVER | – | yes | yes |
| 720-267 | Lumen | DENVER | – | – | yes |
| 720-268 | Lumen | DENVER | – | – | yes |
| 720-269 | AT&T | DENVER | – | yes | yes |
| 720-270 | T-Mobile | DENVER | – | yes | yes |
| 720-271 | T-Mobile | DENVER | – | yes | yes |
| 720-272 | AT&T | DENVER | 2001-01-18 | – | yes |
| 720-273 | AT&T | DENVER | 2001-01-18 | – | yes |
| 720-274 | Windstream | DENVER | – | – | yes |
| 720-275 | AT&T | DENVER | 2001-02-22 | – | yes |
| 720-276 | AT&T | DENVER | 2001-02-22 | – | yes |
| 720-277 | Lumen | DENVER | – | yes | yes |
| 720-278 | Lumen | DENVER | 2001-01-25 | yes | yes |
| 720-279 | Lumen | DENVER | 2001-01-25 | yes | yes |
| 720-280 | T-Mobile | DENVER | – | – | yes |
| 720-281 | Verizon | DENVER | – | yes | yes |
| 720-282 | Lumen | DENVER | 2001-01-25 | yes | yes |
| 720-283 | Lumen | DENVER | – | – | yes |
| 720-284 | Verizon | DENVER | – | yes | yes |
| 720-285 | XO COLORADO, LLC | DENVER | 2009-01-30 | yes | yes |
| 720-286 | AT&T | DENVER | 2002-04-30 | yes | yes |
| 720-287 | Comcast | DENVER | 2010-04-30 | yes | yes |
| 720-288 | Bandwidth | DENVER | 2010-02-26 | yes | yes |
| 720-289 | AT&T | DENVER | 2001-07-25 | – | yes |
| 720-290 | T-Mobile | DENVER | – | yes | yes |
| 720-291 | T-Mobile | DENVER | – | yes | yes |
| 720-292 | AT&T | DENVER | 2009-03-04 | yes | yes |
| 720-293 | Verizon | DENVER | – | – | yes |
| 720-294 | Verizon | DENVER | – | – | yes |
| 720-295 | Bandwidth | DENVER | 2010-03-01 | yes | yes |
| 720-296 | AT&T | DENVER | 2001-01-12 | – | yes |
| 720-297 | AT&T | DENVER | 2001-01-12 | – | yes |
| 720-298 | AT&T | DENVER | 2001-01-12 | – | yes |
| 720-299 | T-Mobile | DENVER | – | – | yes |
| 720-300 | T-Mobile | DENVER | – | yes | yes |
| 720-301 | T-Mobile | DENVER | – | yes | yes |
| 720-302 | AT&T | DENVER | – | yes | yes |
| 720-303 | Bandwidth | DENVER | 2024-02-13 | yes | yes |
| 720-304 | Lumen | DENVER | – | yes | yes |
| 720-305 | Lumen | DENVER | 2001-01-29 | yes | yes |
| 720-306 | Allstream | DENVER | 2001-01-29 | yes | yes |
| 720-307 | AT&T | ALLNSPKLYN | 2012-08-02 | yes | yes |
| 720-308 | AT&T | DENVER | 2001-08-14 | – | yes |
| 720-309 | AT&T | DENVER | 2001-12-05 | – | yes |
| 720-310 | AT&T | ALLNSPKLYN | – | yes | yes |
| 720-312 | T-Mobile | DENVER | 2001-02-20 | yes | yes |
| 720-313 | T-Mobile | DENVER | 2001-02-20 | yes | yes |
| 720-314 | T-Mobile | DENVER | 2001-02-20 | yes | yes |
| 720-315 | Onvoy | DENVER | 2009-10-14 | yes | yes |
| 720-316 | Bandwidth | DENVER | 2010-05-24 | yes | yes |
| 720-317 | T-Mobile | DENVER | – | yes | yes |
| 720-318 | T-Mobile | DENVER | – | yes | yes |
| 720-319 | T-Mobile | DENVER | 2001-04-19 | yes | yes |
| 720-320 | AT&T | DENVER | – | – | yes |
| 720-321 | Lumen | DENVER | 2008-05-29 | yes | yes |
| 720-322 | Lumen | DENVER | – | yes | yes |
| 720-323 | T-Mobile | DENVER | – | – | yes |
| 720-324 | Comcast | DENVER | – | yes | yes |
| 720-325 | T-Mobile | DENVER | 2010-08-06 | yes | yes |
| 720-326 | AT&T | DENVER | 2011-06-13 | yes | yes |
| 720-327 | AT&T | DENVER | 2001-10-18 | – | yes |
| 720-328 | Comcast | DENVER | 2009-10-20 | yes | yes |
| 720-329 | AT&T | DENVER | 2001-10-18 | – | yes |
| 720-330 | Lumen | DENVER | – | yes | yes |
| 720-331 | T-Mobile | DENVER | – | yes | yes |
| 720-332 | Verizon | DENVER | – | – | yes |
| 720-333 | T-Mobile | DENVER | 2001-05-14 | yes | yes |
| 720-334 | T-Mobile | DENVER | 2001-05-14 | yes | yes |
| 720-335 | T-Mobile | DENVER | 2001-05-14 | yes | yes |
| 720-336 | Bandwidth | KEENESBURG | 2010-07-19 | yes | yes |
| 720-337 | Lumen | DENVER | 2009-02-18 | yes | yes |
| 720-338 | AT&T | DENVER | 2001-11-19 | – | yes |
| 720-339 | T-Mobile | DENVER | – | yes | yes |
| 720-340 | Verizon | LONGMONT | 2009-09-04 | yes | yes |
| 720-341 | T-Mobile | DENVER | – | – | yes |
| 720-342 | AT&T | DENVER | 2009-04-15 | yes | yes |
| 720-343 | Lumen | DENVER | 2003-10-31 | yes | yes |
| 720-344 | Lumen | DENVER | – | – | yes |
| 720-345 | ZIPPYTECH INCORPORATED | DENVER | 2007-12-28 | yes | yes |
| 720-346 | Verizon | DENVER | – | yes | yes |
| 720-347 | Lumen | DENVER | 2009-09-28 | yes | yes |
| 720-348 | Lumen | DENVER | – | – | yes |
| 720-349 | AT&T | DENVER | 2011-03-28 | yes | yes |
| 720-350 | T-Mobile | DENVER | – | yes | yes |
| 720-351 | T-Mobile | DENVER | – | yes | yes |
| 720-352 | T-Mobile | DENVER | – | – | yes |
| 720-353 | T-Mobile | DENVER | – | yes | yes |
| 720-354 | Lumen | DENVER | 2011-06-30 | yes | yes |
| 720-355 | Verizon | DENVER | 2012-08-16 | yes | yes |
| 720-356 | AT&T | DENVER | – | yes | yes |
| 720-357 | AT&T | DENVER | 2012-07-05 | yes | yes |
| 720-358 | Verizon | HUDSON | 2009-09-09 | yes | yes |
| 720-359 | Lumen | DENVER | – | – | yes |
| 720-360 | AT&T | DENVER | 2013-01-28 | yes | yes |
| 720-361 | Allstream | DENVER | 2013-07-03 | yes | yes |
| 720-362 | Lumen | DENVER | 2007-06-06 | yes | yes |
| 720-363 | T-Mobile | DENVER | – | yes | yes |
| 720-364 | AT&T | DENVER | 2002-01-15 | – | yes |
| 720-365 | AT&T | DENVER | 2002-01-15 | – | yes |
| 720-366 | AT&T | DENVER | 2002-01-15 | – | yes |
| 720-367 | Verizon | DENVER | – | yes | yes |
| 720-368 | Verizon | DENVER | 2004-04-30 | yes | yes |
| 720-369 | AT&T | DENVER | 2011-03-14 | yes | yes |
| 720-370 | Bandwidth | DENVER | 2013-01-04 | yes | yes |
| 720-371 | T-Mobile | DENVER | – | yes | yes |
| 720-372 | T-Mobile | DENVER | 2013-09-09 | yes | yes |
| 720-373 | T-Mobile | DENVER | – | yes | yes |
| 720-374 | Lumen | DENVER | – | – | yes |
| 720-375 | AT&T | DENVER | 2007-07-10 | yes | yes |
| 720-376 | Allstream | DENVER | 2012-11-12 | yes | yes |
| 720-377 | Verizon | DENVER | – | yes | yes |
| 720-378 | AT&T | LONGMONT | 2010-01-19 | yes | yes |
| 720-379 | Lumen | DENVER | – | yes | yes |
| 720-380 | T-Mobile | DENVER | 2013-02-01 | yes | yes |
| 720-381 | Comcast | DENVER | 2005-08-03 | yes | yes |
| 720-382 | Allstream | DENVER | – | yes | yes |
| 720-383 | Verizon | FORTLUPTON | 2008-11-13 | yes | yes |
| 720-384 | Verizon | DENVER | – | yes | yes |
| 720-385 | Verizon | DENVER | – | yes | yes |
| 720-386 | Bandwidth | GEORGETOWN | 2012-12-03 | yes | yes |
| 720-387 | Lumen | DENVER | 2012-09-04 | yes | yes |
| 720-388 | Verizon | DENVER | 2010-01-11 | yes | yes |
| 720-389 | Verizon | DENVER | 2008-11-17 | yes | yes |
| 720-390 | Verizon | DENVER | – | yes | yes |
| 720-391 | Verizon | DENVER | 2013-07-12 | yes | yes |
| 720-392 | Verizon | DEER TRAIL | 2009-01-30 | yes | yes |
| 720-393 | Lumen | DENVER | 2010-06-07 | yes | yes |
| 720-394 | T-Mobile | DENVER | – | – | yes |
| 720-395 | AT&T | DENVER | 2009-09-04 | yes | yes |
| 720-396 | AT&T | DENVER | 2009-09-08 | yes | yes |
| 720-397 | AT&T | DENVER | 2009-09-08 | yes | yes |
| 720-398 | AT&T | DENVER | 2010-06-28 | yes | yes |
| 720-399 | Lumen | DENVER | 2011-05-06 | yes | yes |
| 720-400 | T-Mobile | DENVER | 2010-10-28 | yes | yes |
| 720-401 | T-Mobile | DENVER | 2009-01-13 | yes | yes |
| 720-402 | Allstream | DENVER | 2011-05-10 | yes | yes |
| 720-403 | Peerless | DENVER | 2013-07-25 | yes | yes |
| 720-404 | AT&T | DENVER | 2001-10-18 | – | yes |
| 720-405 | INTRADO COMMUNICATIONS, LLC | DENVER | 2013-08-30 | yes | yes |
| 720-406 | Lumen | DENVER | – | – | yes |
| 720-407 | Onvoy | DENVER | – | yes | yes |
| 720-408 | Bandwidth | DENVER | 2012-11-15 | yes | yes |
| 720-409 | Windstream | DENVER | 2011-11-22 | yes | yes |
| 720-410 | Comcast | DENVER | 2014-06-27 | yes | yes |
| 720-412 | AT&T | DENVER | 2010-06-28 | yes | yes |
| 720-413 | Verizon | DENVER | 2008-08-27 | yes | yes |
| 720-414 | Lumen | ALLNSPKLYN | 2011-10-04 | yes | yes |
| 720-415 | Verizon | DENVER | 2013-06-12 | yes | yes |
| 720-416 | T-Mobile | DENVER | 2014-06-30 | yes | yes |
| 720-417 | Allstream | DENVER | 2014-08-18 | yes | yes |
| 720-418 | Verizon | DENVER | 2014-03-12 | yes | yes |
| 720-419 | T-Mobile | DENVER | 2016-03-16 | yes | yes |
| 720-420 | Lumen | DENVER | 2010-05-26 | yes | yes |
| 720-421 | T-Mobile | DENVER | 2009-03-20 | yes | yes |
| 720-422 | AT&T | DENVER | 2001-09-26 | – | yes |
| 720-423 | Lumen | DENVER | 2004-04-22 | yes | yes |
| 720-424 | Lumen | DENVER | 2004-04-22 | yes | yes |
| 720-425 | Verizon | DENVER | 2008-01-15 | yes | yes |
| 720-426 | Lumen | DENVER | 2010-04-20 | yes | yes |
| 720-427 | T-Mobile | DENVER | 2002-02-04 | – | yes |
| 720-428 | Onvoy | DENVER | 2011-12-12 | yes | yes |
| 720-429 | AT&T | DENVER | 2008-07-02 | yes | yes |
| 720-430 | AT&T | DENVER | 2012-06-28 | yes | yes |
| 720-431 | AT&T | DENVER | 2010-09-22 | yes | yes |
| 720-432 | Bandwidth | DENVER | 2010-02-26 | yes | yes |
| 720-433 | Lumen | DENVER | – | yes | yes |
| 720-434 | AT&T | DENVER | – | – | yes |
| 720-435 | AT&T | DENVER | – | – | yes |
| 720-436 | AT&T | DENVER | – | – | yes |
| 720-437 | Verizon | DENVER | 2011-02-08 | yes | yes |
| 720-438 | Onvoy | LONGMONT | 2006-09-26 | yes | yes |
| 720-439 | AT&T | DENVER | 2010-04-21 | yes | yes |
| 720-440 | AT&T | DENVER | 2010-05-12 | yes | yes |
| 720-441 | Bandwidth | DENVER | 2011-05-18 | yes | yes |
| 720-442 | Bandwidth | LONGMONT | 2011-04-04 | yes | yes |
| 720-443 | Bandwidth | DENVER | 2010-10-07 | yes | yes |
| 720-444 | Lumen | DENVER | – | – | yes |
| 720-445 | Verizon | DENVER | 2010-09-15 | yes | yes |
| 720-446 | Verizon | DENVER | 2011-02-23 | yes | yes |
| 720-447 | AT&T | DENVER | 2008-02-22 | yes | yes |
| 720-448 | AT&T | DENVER | 2008-04-09 | yes | yes |
| 720-449 | Verizon | DENVER | – | yes | yes |
| 720-450 | Verizon | DENVER | 2014-01-08 | yes | yes |
| 720-451 | T-Mobile | DENVER | 2013-10-25 | yes | yes |
| 720-452 | Peerless | DENVER | 2010-12-28 | yes | yes |
| 720-453 | T-Mobile | LONGMONT | – | yes | yes |
| 720-454 | Windstream | DENVER | 2010-08-11 | yes | yes |
| 720-455 | Lumen | DENVER | 2010-07-02 | yes | yes |
| 720-456 | Lumen | DENVER | 2013-07-23 | yes | yes |
| 720-457 | Lumen | DENVER | – | yes | yes |
| 720-458 | Lumen | DENVER | 2010-09-27 | yes | yes |
| 720-459 | Onvoy | DENVER | 2010-10-15 | yes | yes |
| 720-460 | Allstream | DENVER | 2013-11-13 | yes | yes |
| 720-461 | T-Mobile | DENVER | 2015-12-22 | yes | yes |
| 720-462 | Verizon | DENVER | 2016-11-23 | yes | yes |
| 720-463 | Onvoy | DECKERS | 2013-02-05 | yes | yes |
| 720-464 | Bandwidth | DENVER | 2011-04-21 | yes | yes |
| 720-465 | AT&T | DENVER | 2012-01-03 | yes | yes |
| 720-466 | AT&T | FORTLUPTON | 2010-06-28 | yes | yes |
| 720-467 | Verizon | DENVER | 2014-01-10 | yes | yes |
| 720-468 | Lumen | DENVER | 2001-12-17 | yes | yes |
| 720-469 | AT&T | DENVER | 2011-09-23 | yes | yes |
| 720-470 | Verizon | DENVER | – | yes | yes |
| 720-471 | Verizon | DENVER | 2014-06-12 | yes | yes |
| 720-472 | AT&T | DENVER | – | yes | yes |
| 720-473 | Onvoy | DENVER | – | yes | yes |
| 720-474 | T-Mobile | DENVER | 2011-10-31 | yes | yes |
| 720-475 | AT&T | DENVER | – | yes | yes |
| 720-476 | AT&T | DENVER | 2014-05-19 | yes | yes |
| 720-477 | Onvoy | DENVER | 2011-08-09 | yes | yes |
| 720-478 | Lumen | DENVER | 2013-05-08 | yes | yes |
| 720-479 | AT&T | DENVER | – | yes | yes |
| 720-480 | AT&T | DENVER | – | – | yes |
| 720-481 | AT&T | DENVER | 2014-08-15 | yes | yes |
| 720-482 | Lumen | DENVER | – | – | yes |
| 720-483 | AT&T | DENVER | 2014-08-04 | yes | yes |
| 720-484 | Allstream | DENVER | 2011-07-18 | yes | yes |
| 720-485 | Comcast | DENVER | 2014-05-08 | yes | yes |
| 720-486 | AT&T | DENVER | 2014-08-18 | yes | yes |
| 720-487 | Telnyx | LONGMONT | 2016-12-09 | yes | yes |
| 720-488 | Lumen | DENVER | – | – | yes |
| 720-489 | Lumen | DENVER | – | – | yes |
| 720-490 | T-Mobile | DENVER | – | yes | yes |
| 720-491 | AT&T | LONGMONT | 2011-11-16 | yes | yes |
| 720-492 | T-Mobile | DENVER | 2014-08-25 | yes | yes |
| 720-493 | Lumen | DENVER | – | – | yes |
| 720-494 | Lumen | LONGMONT | – | – | yes |
| 720-495 | AT&T | DENVER | 2001-09-28 | – | yes |
| 720-496 | Lumen | DENVER | 2001-12-17 | yes | yes |
| 720-497 | Lumen | DENVER | – | – | yes |
| 720-498 | Verizon | DENVER | 2012-09-10 | yes | yes |
| 720-499 | T-Mobile | DENVER | 2011-08-09 | yes | yes |
| 720-500 | Peerless | DENVER | 2014-10-07 | yes | yes |
| 720-501 | T-Mobile | DENVER | 2014-08-28 | yes | yes |
| 720-502 | Comcast | DENVER | 2012-11-15 | yes | yes |
| 720-503 | AT&T | DENVER | 2014-10-02 | yes | yes |
| 720-504 | Bandwidth | DENVER | 2013-05-24 | yes | yes |
| 720-505 | Verizon | DENVER | 2011-01-11 | yes | yes |
| 720-506 | Lumen | DENVER | 2001-12-17 | yes | yes |
| 720-507 | Bandwidth | DENVER | 2014-10-30 | yes | yes |
| 720-508 | Allstream | DENVER | 2012-06-26 | yes | yes |
| 720-509 | Verizon | DENVER | 2010-04-02 | yes | yes |
| 720-510 | Comcast | DENVER | 2017-06-13 | yes | yes |
| 720-512 | Comcast | DENVER | 2016-05-09 | yes | yes |
| 720-513 | Onvoy | DENVER | 2017-08-25 | yes | yes |
| 720-514 | AT&T | DENVER | – | yes | yes |
| 720-515 | Bandwidth | DENVER | 2010-02-11 | yes | yes |
| 720-516 | Lumen | DENVER | 2017-07-21 | yes | yes |
| 720-517 | AT&T | DENVER | 2015-06-30 | yes | yes |
| 720-518 | Allstream | DENVER | 2014-05-16 | yes | yes |
| 720-519 | AT&T | DENVER | – | yes | yes |
| 720-520 | Charter | DENVER | 2016-05-13 | yes | yes |
| 720-521 | American Messaging | DENVER | – | – | yes |
| 720-522 | Verizon | DENVER | 2010-11-19 | yes | yes |
| 720-523 | Lumen | DENVER | 2010-05-24 | yes | yes |
| 720-524 | Lumen | DENVER | – | yes | yes |
| 720-525 | T-Mobile | DENVER | 2013-04-02 | yes | yes |
| 720-526 | AT&T | LONGMONT | 2014-06-12 | yes | yes |
| 720-527 | TELIAX, INC. - CO | DENVER | 2017-10-27 | yes | yes |
| 720-528 | Lumen | DENVER | – | – | yes |
| 720-529 | Lumen | DENVER | – | – | yes |
| 720-530 | AT&T | DENVER | – | – | yes |
| 720-531 | Comcast | DENVER | 2016-08-16 | yes | yes |
| 720-532 | AT&T | DENVER | – | yes | yes |
| 720-533 | AT&T | DENVER | – | – | yes |
| 720-534 | Vonage | LONGMONT | 2016-08-31 | yes | yes |
| 720-535 | AT&T | DENVER | – | yes | yes |
| 720-536 | Lumen | DENVER | – | yes | yes |
| 720-537 | FASTTRACK COMMUNICATIONS, INC. - CO | DENVER | 2014-10-22 | yes | yes |
| 720-538 | Verizon | FORTLUPTON | 2012-09-24 | yes | yes |
| 720-539 | AT&T | DENVER | 2011-07-08 | yes | yes |
| 720-540 | Lumen | DENVER | – | – | yes |
| 720-541 | Verizon | DENVER | 2012-09-28 | yes | yes |
| 720-542 | Lumen | DENVER | – | yes | yes |
| 720-543 | Peerless | DENVER | 2016-10-14 | yes | yes |
| 720-544 | Lumen | DENVER | – | yes | yes |
| 720-545 | Lumen | DENVER | 2009-06-12 | yes | yes |
| 720-546 | T-Mobile | DENVER | 2016-08-23 | yes | yes |
| 720-547 | Bandwidth | KEENESBURG | 2018-03-30 | yes | yes |
| 720-548 | Lumen | DENVER | – | yes | yes |
| 720-549 | Lumen | DENVER | – | yes | yes |
| 720-550 | Windstream | DENVER | 2013-06-25 | yes | yes |
| 720-551 | AT&T | DENVER | 2011-04-01 | yes | yes |
| 720-552 | Verizon | LONGMONT | 2012-11-16 | yes | yes |
| 720-553 | Lumen | DENVER | 2012-06-22 | yes | yes |
| 720-554 | Lumen | DENVER | – | – | yes |
| 720-556 | Verizon | DENVER | 2011-05-10 | yes | yes |
| 720-557 | Verizon | DENVER | 2013-06-12 | yes | yes |
| 720-558 | Lumen | DENVER | 2002-03-13 | – | yes |
| 720-559 | AT&T | DENVER | – | – | yes |
| 720-560 | AT&T | DENVER | – | – | yes |
| 720-561 | Lumen | DENVER | 2008-04-18 | yes | yes |
| 720-562 | Lumen | DENVER | – | – | yes |
| 720-563 | Lumen | DENVER | – | yes | yes |
| 720-564 | Lumen | DENVER | – | – | yes |
| 720-565 | Lumen | DENVER | – | – | yes |
| 720-566 | Lumen | DENVER | – | – | yes |
| 720-567 | Lumen | DENVER | – | – | yes |
| 720-568 | Lumen | DENVER | 2001-02-27 | yes | yes |
| 720-569 | AT&T | DENVER | 2008-10-08 | yes | yes |
| 720-570 | Lumen | DENVER | – | yes | yes |
| 720-571 | Onvoy | ALLNSPKLYN | 2016-03-01 | yes | yes |
| 720-572 | AT&T | DENVER | 2016-12-14 | yes | yes |
| 720-573 | Lumen | DENVER | 2014-10-17 | yes | yes |
| 720-574 | Bandwidth | DENVER | 2018-06-29 | yes | yes |
| 720-575 | Onvoy | DENVER | 2014-11-11 | yes | yes |
| 720-576 | Verizon | DENVER | 2016-11-09 | yes | yes |
| 720-577 | Lumen | DENVER | 2014-07-03 | yes | yes |
| 720-578 | Lumen | DENVER | – | – | yes |
| 720-579 | Verizon | DENVER | – | yes | yes |
| 720-580 | Bandwidth | KEENESBURG | 2013-03-15 | yes | yes |
| 720-581 | T-Mobile | DENVER | – | yes | yes |
| 720-582 | Verizon | DENVER | 2015-11-12 | yes | yes |
| 720-583 | Onvoy | DENVER | 2010-09-30 | yes | yes |
| 720-584 | Verizon | DENVER | 2014-10-21 | yes | yes |
| 720-585 | T-Mobile | DENVER | 2012-11-02 | yes | yes |
| 720-586 | T-Mobile | DENVER | 2017-05-25 | yes | yes |
| 720-587 | AT&T | DENVER | – | yes | yes |
| 720-588 | NUSO, LLC | DENVER | 2012-10-17 | yes | yes |
| 720-589 | T-Mobile | DENVER | 2013-04-30 | yes | yes |
| 720-590 | Onvoy | DENVER | 2013-02-05 | yes | yes |
| 720-591 | Verizon | DENVER | 2016-09-15 | yes | yes |
| 720-592 | T-Mobile | DENVER | 2016-12-08 | yes | yes |
| 720-593 | Lumen | DENVER | 2014-04-02 | yes | yes |
| 720-594 | Onvoy | DENVER | 2017-06-30 | yes | yes |
| 720-595 | Lumen | DENVER | 2016-05-10 | yes | yes |
| 720-596 | AT&T | DENVER | – | yes | yes |
| 720-597 | Verizon | LONGMONT | 2016-01-11 | yes | yes |
| 720-598 | Bandwidth | DENVER | 2015-02-26 | yes | yes |
| 720-599 | Allstream | DENVER | 2012-02-13 | yes | yes |
| 720-600 | Onvoy | LONGMONT | 2012-12-20 | yes | yes |
| 720-601 | Verizon | DENVER | 2017-12-21 | yes | yes |
| 720-602 | T-Mobile | DENVER | 2017-07-31 | yes | yes |
| 720-603 | Lumen | DENVER | 2017-09-01 | yes | yes |
| 720-604 | Bandwidth | DENVER | 2022-12-16 | yes | yes |
| 720-605 | Onvoy | DENVER | 2015-11-17 | yes | yes |
| 720-606 | AT&T | FORTLUPTON | 2011-08-12 | yes | yes |
| 720-607 | Verizon | DENVER | 2017-03-16 | yes | yes |
| 720-608 | Bandwidth | GEORGETOWN | 2010-07-19 | yes | yes |
| 720-609 | AT&T | DENVER | 2014-06-03 | yes | yes |
| 720-610 | Verizon | DENVER | 2018-07-30 | yes | yes |
| 720-612 | T-Mobile | DENVER | 2011-07-22 | yes | yes |
| 720-613 | Verizon | HUDSON | 2013-03-01 | yes | yes |
| 720-614 | AIRESPRING, INC. | DENVER | 2018-10-04 | yes | yes |
| 720-615 | Bandwidth | KEENESBURG | 2020-08-17 | yes | yes |
| 720-616 | Lumen | DENVER | 2014-08-29 | yes | yes |
| 720-617 | Windstream | DENVER | 2019-04-18 | yes | yes |
| 720-618 | Verizon | DENVER | 2014-07-10 | yes | yes |
| 720-619 | Bandwidth | GEORGETOWN | 2014-03-25 | yes | yes |
| 720-620 | AT&T | DENVER | 2002-03-27 | – | yes |
| 720-621 | AT&T | DENVER | 2002-03-27 | – | yes |
| 720-622 | Lumen | DENVER | – | yes | yes |
| 720-623 | Onvoy | DENVER | 2012-02-17 | yes | yes |
| 720-624 | AT&T | DENVER | – | yes | yes |
| 720-625 | Windstream | DENVER | 2011-09-20 | yes | yes |
| 720-626 | Verizon | DENVER | 2011-01-11 | yes | yes |
| 720-627 | Lumen | DENVER | 2012-03-06 | yes | yes |
| 720-628 | AT&T | DENVER | 2002-03-04 | – | yes |
| 720-629 | AT&T | DENVER | 2002-03-04 | – | yes |
| 720-630 | AT&T | DENVER | 2013-10-23 | yes | yes |
| 720-631 | Verizon | DENVER | 2017-04-03 | yes | yes |
| 720-632 | AT&T | DENVER | 2018-01-11 | yes | yes |
| 720-633 | AT&T | DENVER | 2010-12-28 | yes | yes |
| 720-634 | Verizon | DENVER | 2012-11-16 | yes | yes |
| 720-635 | AT&T | DENVER | – | – | yes |
| 720-636 | Verizon | DENVER | 2013-11-13 | yes | yes |
| 720-637 | Onvoy | DENVER | 2021-10-21 | yes | yes |
| 720-638 | Comcast | DENVER | 2013-01-17 | yes | yes |
| 720-639 | Onvoy | DENVER | 2014-05-14 | yes | yes |
| 720-640 | Lumen | HUDSON | 2019-01-28 | yes | yes |
| 720-641 | T-Mobile | DENVER | – | yes | yes |
| 720-642 | Verizon | DENVER | 2015-10-22 | yes | yes |
| 720-643 | Lumen | DENVER | 2015-08-24 | yes | yes |
| 720-644 | Windstream | DENVER | 2011-04-01 | yes | yes |
| 720-645 | T-Mobile | DENVER | 2014-03-05 | yes | yes |
| 720-646 | AT&T | DENVER | 2015-10-07 | yes | yes |
| 720-647 | Onvoy | DENVER | 2019-05-20 | yes | yes |
| 720-648 | Verizon | DENVER | 2011-05-10 | yes | yes |
| 720-649 | Bandwidth | GEORGETOWN | 2018-08-30 | yes | yes |
| 720-650 | Onvoy | DENVER | 2017-08-17 | yes | yes |
| 720-651 | Verizon | DENVER | 2015-10-15 | yes | yes |
| 720-652 | Lumen | LONGMONT | – | – | yes |
| 720-653 | Verizon | DENVER | 2019-06-03 | yes | yes |
| 720-654 | AT&T | DENVER | 2022-01-10 | yes | yes |
| 720-655 | T-Mobile | DENVER | 2021-08-30 | yes | yes |
| 720-656 | AT&T | DENVER | 2015-10-07 | yes | yes |
| 720-657 | Bandwidth | DENVER | 2019-02-25 | yes | yes |
| 720-658 | TELSTAR COMMUNICATIONS INC | DENVER | 2010-03-26 | – | yes |
| 720-659 | Vonage | DENVER | 2022-07-15 | yes | yes |
| 720-660 | Verizon | DENVER | 2014-04-08 | yes | yes |
| 720-661 | Verizon | DENVER | 2018-12-24 | yes | yes |
| 720-662 | T-Mobile | DENVER | 2014-09-30 | yes | yes |
| 720-663 | Bandwidth | DENVER | 2008-05-28 | yes | yes |
| 720-664 | Onvoy | ALLNSPKLYN | 2019-08-16 | yes | yes |
| 720-665 | Verizon | DENVER | 2017-08-30 | yes | yes |
| 720-666 | Peerless | DENVER | 2012-05-23 | yes | yes |
| 720-667 | Comcast | DENVER | 2017-11-21 | yes | yes |
| 720-668 | Verizon | DENVER | 2014-10-16 | yes | yes |
| 720-669 | Onvoy | HUDSON | 2014-12-12 | yes | yes |
| 720-670 | Verizon | DENVER | – | yes | yes |
| 720-671 | Verizon | DENVER | 2019-04-25 | yes | yes |
| 720-672 | Verizon | DENVER | 2019-09-30 | yes | yes |
| 720-673 | EXIANT COMMUNICATIONS LLC | DENVER | 2019-08-23 | yes | yes |
| 720-674 | Comcast | DENVER | 2020-02-20 | yes | yes |
| 720-675 | AT&T | DENVER | 2009-05-12 | yes | yes |
| 720-676 | Verizon | DENVER | 2016-08-29 | yes | yes |
| 720-677 | Onvoy | DENVER | 2019-06-20 | yes | yes |
| 720-678 | CSC WIRELESS, LLC | DENVER | 2019-10-09 | yes | yes |
| 720-679 | Onvoy | GEORGETOWN | 2019-08-16 | yes | yes |
| 720-680 | T-Mobile | LONGMONT | 2020-06-04 | yes | yes |
| 720-681 | T-Mobile | DENVER | 2019-04-09 | yes | yes |
| 720-682 | Verizon | DENVER | 2018-10-22 | yes | yes |
| 720-683 | Bandwidth | FORTLUPTON | 2013-05-15 | yes | yes |
| 720-684 | Lumen | LONGMONT | – | yes | yes |
| 720-685 | Lumen | DENVER | – | yes | yes |
| 720-686 | Verizon | DENVER | 2010-10-14 | yes | yes |
| 720-687 | T-Mobile | DENVER | 2019-11-19 | yes | yes |
| 720-688 | AT&T | DENVER | 2015-07-15 | yes | yes |
| 720-689 | Bandwidth | DENVER | 2011-04-04 | yes | yes |
| 720-690 | AT&T | DENVER | 2002-03-27 | – | yes |
| 720-691 | T-Mobile | DENVER | 2019-06-25 | yes | yes |
| 720-692 | T-Mobile | DENVER | 2015-05-27 | yes | yes |
| 720-693 | Verizon | DENVER | 2017-01-11 | yes | yes |
| 720-694 | T-Mobile | DENVER | 2020-03-24 | yes | yes |
| 720-695 | Verizon | DENVER | 2014-08-12 | yes | yes |
| 720-696 | Bandwidth | DENVER | 2015-06-01 | yes | yes |
| 720-697 | Lumen | DENVER | 2015-11-09 | yes | yes |
| 720-698 | Verizon | LONGMONT | 2022-03-15 | yes | yes |
| 720-699 | Onvoy | DENVER | 2014-11-11 | yes | yes |
| 720-701 | AT&T | DENVER | 2019-04-16 | yes | yes |
| 720-702 | Onvoy | KEENESBURG | 2020-03-27 | yes | yes |
| 720-703 | NUSO, LLC | DENVER | 2020-06-19 | yes | yes |
| 720-704 | T-Mobile | DENVER | 2020-03-31 | yes | yes |
| 720-705 | AT&T | DENVER | 2014-10-02 | yes | yes |
| 720-706 | Onvoy | DENVER | 2020-07-13 | yes | yes |
| 720-707 | Onvoy | DENVER | 2014-11-21 | yes | yes |
| 720-708 | TELIAX, INC. - CO | DENVER | 2011-08-12 | yes | yes |
| 720-709 | Windstream | DENVER | 2014-08-21 | yes | yes |
| 720-710 | Onvoy | DENVER | 2016-09-07 | yes | yes |
| 720-712 | Bandwidth | FORTLUPTON | 2019-06-20 | yes | yes |
| 720-713 | Onvoy | LONGMONT | 2019-08-16 | yes | yes |
| 720-714 | Onvoy | LONGMONT | 2020-08-24 | yes | yes |
| 720-715 | Bandwidth | DECKERS | 2019-02-08 | yes | yes |
| 720-716 | Lumen | DENVER | 2020-03-25 | yes | yes |
| 720-717 | AT&T | DENVER | 2015-03-03 | yes | yes |
| 720-718 | Lumen | LONGMONT | 2016-12-19 | yes | yes |
| 720-719 | Bandwidth | DENVER | 2024-04-03 | yes | yes |
| 720-720 | AT&T | DENVER | 2024-09-03 | yes | yes |
| 720-721 | THE VOICE APPLICATION NETWORK, LLC | DENVER | – | yes | yes |
| 720-722 | Lumen | DENVER | 2010-05-21 | yes | yes |
| 720-723 | Allstream | DENVER | 2013-02-04 | yes | yes |
| 720-724 | Allstream | DENVER | 2013-04-02 | yes | yes |
| 720-725 | T-Mobile | DENVER | 2015-06-10 | yes | yes |
| 720-726 | Comcast | DENVER | 2013-10-29 | yes | yes |
| 720-727 | Bandwidth | LONGMONT | 2018-06-12 | yes | yes |
| 720-728 | Lumen | DENVER | 2015-12-16 | yes | yes |
| 720-729 | Bandwidth | KEENESBURG | 2012-03-02 | yes | yes |
| 720-730 | Onvoy | DENVER | 2018-09-20 | yes | yes |
| 720-731 | Lumen | LONGMONT | 2019-01-04 | yes | yes |
| 720-732 | T-Mobile | DENVER | – | yes | yes |
| 720-733 | Lumen | DENVER | – | – | yes |
| 720-734 | Onvoy | DENVER | 2020-05-11 | yes | yes |
| 720-735 | Onvoy | KEENESBURG | 2014-10-28 | yes | yes |
| 720-736 | Onvoy | DENVER | 2021-01-21 | yes | yes |
| 720-737 | Verizon | DENVER | 2012-12-13 | yes | yes |
| 720-738 | Onvoy | DENVER | 2019-04-29 | yes | yes |
| 720-739 | Bandwidth | DENVER | 2014-04-29 | yes | yes |
| 720-740 | HD CARRIER LLC | DECKERS | 2019-08-29 | yes | yes |
| 720-741 | Onvoy | GEORGETOWN | 2020-08-19 | yes | yes |
| 720-742 | T-Mobile | DENVER | 2020-09-11 | yes | yes |
| 720-743 | Bandwidth | LONGMONT | 2020-09-21 | yes | yes |
| 720-744 | Lumen | DENVER | – | yes | yes |
| 720-745 | Lumen | LONGMONT | 2015-04-17 | yes | yes |
| 720-746 | Lumen | DENVER | – | yes | yes |
| 720-747 | Lumen | DENVER | – | – | yes |
| 720-748 | Lumen | DENVER | – | – | yes |
| 720-749 | Peerless | DENVER | 2015-09-25 | yes | yes |
| 720-750 | T-Mobile | DENVER | 2019-01-28 | yes | yes |
| 720-751 | T-Mobile | DENVER | 2020-01-09 | yes | yes |
| 720-752 | Lumen | DENVER | 2020-08-17 | yes | yes |
| 720-753 | AT&T | FORTLUPTON | 2015-12-01 | yes | yes |
| 720-754 | Lumen | DENVER | 2010-03-30 | yes | yes |
| 720-755 | T-Mobile | DENVER | 2015-09-01 | yes | yes |
| 720-756 | T-Mobile | DENVER | 2020-11-24 | yes | yes |
| 720-757 | T-Mobile | DENVER | 2014-09-30 | yes | yes |
| 720-758 | Lumen | DENVER | 2016-12-20 | yes | yes |
| 720-759 | Bandwidth | LONGMONT | 2016-08-10 | yes | yes |
| 720-760 | Twilio | DENVER | 2020-10-15 | yes | yes |
| 720-761 | T-Mobile | DENVER | – | yes | yes |
| 720-762 | Verizon | DENVER | 2019-07-18 | yes | yes |
| 720-763 | AT&T | DENVER | 2009-11-05 | yes | yes |
| 720-764 | Onvoy | HUDSON | 2020-10-23 | yes | yes |
| 720-765 | Verizon | DENVER | 2017-09-29 | yes | yes |
| 720-766 | FRACTEL, LLC | DENVER | 2019-01-25 | yes | yes |
| 720-767 | T-Mobile | DENVER | 2014-07-14 | yes | yes |
| 720-768 | COMMIO, LLC | DENVER | 2017-11-14 | yes | yes |
| 720-769 | Vonage | DENVER | 2020-09-03 | yes | yes |
| 720-770 | Bandwidth | DECKERS | 2014-09-30 | yes | yes |
| 720-771 | T-Mobile | DENVER | – | – | yes |
| 720-772 | Allstream | DENVER | 2014-10-15 | yes | yes |
| 720-773 | Verizon | DENVER | 2015-02-09 | yes | yes |
| 720-774 | AT&T | DENVER | 2015-06-04 | yes | yes |
| 720-775 | AT&T | DENVER | 2009-10-14 | yes | yes |
| 720-776 | Peerless | DECKERS | 2019-02-14 | yes | yes |
| 720-777 | Lumen | DENVER | 2006-02-09 | yes | yes |
| 720-778 | Bandwidth | DENVER | 2014-09-30 | yes | yes |
| 720-779 | Bandwidth | DENVER | 2019-06-12 | yes | yes |
| 720-780 | Onvoy | DENVER | 2019-12-16 | yes | yes |
| 720-781 | T-Mobile | LONGMONT | 2020-11-24 | yes | yes |
| 720-782 | AT&T | HUDSON | 2019-07-02 | yes | yes |
| 720-783 | Onvoy | DENVER | 2022-11-16 | yes | yes |
| 720-784 | Onvoy | GEORGETOWN | 2020-12-31 | yes | yes |
| 720-785 | AT&T | DENVER | – | yes | yes |
| 720-786 | T-Mobile | DENVER | 2022-08-12 | yes | yes |
| 720-787 | T-Mobile | DENVER | 2016-08-23 | yes | yes |
| 720-788 | Verizon | DENVER | 2017-01-06 | yes | yes |
| 720-789 | Lumen | DENVER | 2011-08-05 | yes | yes |
| 720-790 | Onvoy | ALLNSPKLYN | 2020-08-18 | yes | yes |
| 720-791 | Telnyx | GEORGETOWN | 2017-03-16 | yes | yes |
| 720-792 | Onvoy | DENVER | 2020-11-09 | yes | yes |
| 720-793 | Verizon | DENVER | 2018-11-13 | yes | yes |
| 720-794 | Onvoy | ALLNSPKLYN | – | yes | yes |
| 720-795 | Lumen | DENVER | 2017-06-21 | yes | yes |
| 720-796 | NUSO, LLC | GEORGETOWN | 2020-12-11 | yes | yes |
| 720-797 | Bandwidth | KEENESBURG | 2019-05-22 | yes | yes |
| 720-798 | Bandwidth | DENVER | 2020-04-21 | yes | yes |
| 720-799 | Onvoy | DENVER | 2015-03-13 | yes | yes |
| 720-800 | Onvoy | DENVER | 2012-11-08 | yes | yes |
| 720-801 | HD CARRIER LLC | GEORGETOWN | – | yes | yes |
| 720-802 | Onvoy | FORTLUPTON | 2020-08-19 | yes | yes |
| 720-803 | T-Mobile | DENVER | 2021-01-14 | yes | yes |
| 720-804 | T-Mobile | LONGMONT | 2021-03-05 | yes | yes |
| 720-805 | VoIP Innovations | DENVER | 2018-08-15 | yes | yes |
| 720-806 | Peerless | DECKERS | 2021-02-24 | yes | yes |
| 720-807 | Onvoy | DENVER | 2020-08-27 | yes | yes |
| 720-808 | Bandwidth | DENVER | 2010-10-20 | yes | yes |
| 720-809 | T-Mobile | DENVER | 2014-08-22 | yes | yes |
| 720-810 | Verizon | DENVER | – | yes | yes |
| 720-812 | Verizon | DENVER | 2020-03-24 | yes | yes |
| 720-813 | IP HORIZON LLC | DENVER | 2021-03-05 | yes | yes |
| 720-814 | Verizon | DEER TRAIL | 2021-09-07 | yes | yes |
| 720-815 | Comcast | LONGMONT | 2017-09-01 | yes | yes |
| 720-816 | Charter | ALLNSPKLYN | 2023-03-29 | yes | yes |
| 720-817 | Comcast | STRASBURG | 2021-09-24 | yes | yes |
| 720-818 | Verizon | LONGMONT | 2017-09-01 | yes | yes |
| 720-819 | T-Mobile | DENVER | 2018-03-09 | yes | yes |
| 720-820 | WIDE VOICE, LLC - CO | DENVER | 2015-09-28 | yes | yes |
| 720-821 | Onvoy | LONGMONT | 2021-01-06 | yes | yes |
| 720-822 | Verizon | DENVER | 2014-05-12 | yes | yes |
| 720-823 | Onvoy | DENVER | 2021-01-08 | yes | yes |
| 720-824 | Vonage | HUDSON | 2021-10-20 | yes | yes |
| 720-825 | HD CARRIER LLC | DENVER | – | yes | yes |
| 720-826 | Comcast | DENVER | 2019-07-30 | yes | yes |
| 720-827 | T-Mobile | DENVER | 2018-03-22 | yes | yes |
| 720-828 | T-Mobile | DENVER | 2018-11-12 | yes | yes |
| 720-829 | T-Mobile | DENVER | 2014-07-29 | yes | yes |
| 720-830 | HD CARRIER LLC | DENVER | 2018-12-03 | yes | yes |
| 720-831 | AT&T | DENVER | 2021-10-25 | yes | yes |
| 720-832 | Charter | HUDSON | 2023-03-29 | yes | yes |
| 720-833 | Lumen | DENVER | – | yes | yes |
| 720-834 | AT&T | DENVER | – | – | yes |
| 720-835 | AT&T | DENVER | 2015-09-25 | yes | yes |
| 720-836 | Lumen | DENVER | – | yes | yes |
| 720-837 | T-Mobile | DENVER | – | yes | yes |
| 720-838 | T-Mobile | DENVER | – | yes | yes |
| 720-839 | T-Mobile | DENVER | – | yes | yes |
| 720-840 | T-Mobile | DENVER | – | yes | yes |
| 720-841 | T-Mobile | DENVER | – | yes | yes |
| 720-842 | Lumen | DENVER | – | yes | yes |
| 720-843 | Charter | DENVER | 2021-10-21 | yes | yes |
| 720-844 | LEAP TELECOM, LLC | DENVER | 2021-01-25 | yes | yes |
| 720-845 | T-Mobile | DENVER | 2017-08-30 | yes | yes |
| 720-846 | Verizon | DEER TRAIL | 2022-06-22 | yes | yes |
| 720-847 | Lumen | DENVER | 2003-11-05 | yes | yes |
| 720-848 | Lumen | DENVER | – | – | yes |
| 720-849 | T-Mobile | DENVER | – | yes | yes |
| 720-850 | FIVE9, INC. | DENVER | 2021-05-27 | yes | yes |
| 720-851 | Lumen | DENVER | – | – | yes |
| 720-852 | Lumen | DENVER | – | – | yes |
| 720-853 | Bandwidth | LONGMONT | 2021-10-25 | yes | yes |
| 720-854 | Lumen | DENVER | – | yes | yes |
| 720-855 | Lumen | DENVER | – | yes | yes |
| 720-856 | Onvoy | FORTLUPTON | – | yes | yes |
| 720-857 | Lumen | DENVER | – | – | yes |
| 720-858 | Lumen | DENVER | – | – | yes |
| 720-859 | Lumen | DENVER | – | – | yes |
| 720-860 | Charter | DENVER | 2022-08-12 | yes | yes |
| 720-861 | Bandwidth | GEORGETOWN | 2021-10-26 | yes | yes |
| 720-862 | Verizon | DENVER | – | yes | yes |
| 720-863 | Verizon | DENVER | – | yes | yes |
| 720-864 | Lumen | LONGMONT | – | yes | yes |
| 720-865 | Lumen | DENVER | – | – | yes |
| 720-866 | TERRA NOVA TELECOM INC. | DENVER | 2019-02-22 | yes | yes |
| 720-868 | Onvoy | FORTLUPTON | 2021-04-01 | yes | yes |
| 720-869 | AT&T | DENVER | 2021-10-25 | yes | yes |
| 720-870 | Lumen | DENVER | – | – | yes |
| 720-871 | T-Mobile | LONGMONT | 2021-11-18 | yes | yes |
| 720-872 | Lumen | DENVER | – | – | yes |
| 720-873 | Lumen | DENVER | – | – | yes |
| 720-874 | Lumen | DENVER | – | – | yes |
| 720-875 | Lumen | DENVER | – | – | yes |
| 720-876 | Lumen | DENVER | – | yes | yes |
| 720-877 | Lumen | DENVER | – | yes | yes |
| 720-878 | AT&T | DENVER | – | yes | yes |
| 720-879 | Lumen | DENVER | – | yes | yes |
| 720-880 | Verizon | DENVER | – | yes | yes |
| 720-881 | Bandwidth | DENVER | – | yes | yes |
| 720-882 | AT&T | DENVER | – | yes | yes |
| 720-883 | Lumen | DENVER | – | yes | yes |
| 720-884 | Lumen | DENVER | – | yes | yes |
| 720-885 | AT&T | DENVER | 2010-02-04 | yes | yes |
| 720-886 | Lumen | DENVER | – | – | yes |
| 720-887 | Lumen | DENVER | – | – | yes |
| 720-888 | Lumen | DENVER | – | – | yes |
| 720-889 | Verizon | DENVER | – | – | yes |
| 720-890 | Lumen | DENVER | – | – | yes |
| 720-891 | Lumen | DENVER | 2001-12-17 | yes | yes |
| 720-892 | Bandwidth | DENVER | 2018-03-20 | yes | yes |
| 720-893 | Bandwidth | ALLNSPKLYN | 2014-08-08 | yes | yes |
| 720-894 | Bandwidth | DECKERS | 2021-10-25 | yes | yes |
| 720-895 | Lumen | DENVER | – | – | yes |
| 720-896 | T-Mobile | DENVER | 2021-11-12 | yes | yes |
| 720-897 | Lumen | DENVER | – | yes | yes |
| 720-898 | Lumen | DENVER | – | – | yes |
| 720-899 | Verizon | LONGMONT | 2014-11-10 | yes | yes |
| 720-900 | Peerless | DENVER | 2014-10-07 | yes | yes |
| 720-901 | Telnyx | DENVER | 2021-11-17 | yes | yes |
| 720-902 | Verizon | DENVER | 2019-05-01 | yes | yes |
| 720-903 | Lumen | DENVER | – | yes | yes |
| 720-904 | Lumen | DENVER | – | – | yes |
| 720-905 | FIVE9, INC. | DENVER | 2022-01-26 | yes | yes |
| 720-906 | Comcast | BYERS | 2021-12-03 | yes | yes |
| 720-907 | Lumen | DENVER | – | yes | yes |
| 720-908 | Verizon | DENVER | 2017-05-15 | yes | yes |
| 720-909 | Bandwidth | DENVER | – | yes | yes |
| 720-910 | Verizon | DENVER | 2022-03-25 | yes | yes |
| 720-912 | Onvoy | DENVER | 2020-10-05 | yes | yes |
| 720-913 | Lumen | DENVER | – | – | yes |
| 720-914 | T-Mobile | FORTLUPTON | 2024-01-16 | yes | yes |
| 720-915 | Vonage | ALLNSPKLYN | 2022-06-24 | yes | yes |
| 720-916 | Verizon | DENVER | 2022-07-06 | yes | yes |
| 720-917 | Lumen | DENVER | – | yes | yes |
| 720-918 | Vonage | KEENESBURG | 2022-06-24 | yes | yes |
| 720-919 | T-Mobile | DENVER | 2016-08-23 | yes | yes |
| 720-920 | AT&T | DENVER | – | yes | yes |
| 720-921 | Lumen | DENVER | – | yes | yes |
| 720-922 | Lumen | DENVER | – | – | yes |
| 720-923 | ADVANCED TELECOM SOLUTIONS, LLC | DENVER | 2018-08-22 | yes | yes |
| 720-924 | Lumen | DECKERS | – | yes | yes |
| 720-925 | Comcast | DENVER | 2015-12-18 | yes | yes |
| 720-926 | Verizon | DENVER | 2018-06-14 | yes | yes |
| 720-927 | Bandwidth | LONGMONT | 2019-03-27 | yes | yes |
| 720-928 | Bandwidth | FORTLUPTON | 2018-05-15 | yes | yes |
| 720-929 | Lumen | DENVER | – | yes | yes |
| 720-930 | Verizon | DENVER | 2015-08-27 | yes | yes |
| 720-931 | Lumen | DENVER | – | – | yes |
| 720-932 | Lumen | DENVER | – | – | yes |
| 720-933 | T-Mobile | DENVER | – | – | yes |
| 720-934 | T-Mobile | DENVER | – | – | yes |
| 720-935 | T-Mobile | DENVER | – | – | yes |
| 720-936 | T-Mobile | DENVER | – | – | yes |
| 720-937 | T-Mobile | DENVER | – | – | yes |
| 720-938 | T-Mobile | DENVER | – | – | yes |
| 720-939 | T-Mobile | DENVER | – | – | yes |
| 720-940 | T-Mobile | DENVER | – | yes | yes |
| 720-941 | Lumen | DENVER | – | – | yes |
| 720-942 | Lumen | DENVER | – | – | yes |
| 720-943 | Lumen | DENVER | – | yes | yes |
| 720-944 | Lumen | DENVER | – | – | yes |
| 720-945 | Lumen | DENVER | – | yes | yes |
| 720-946 | Lumen | DENVER | – | – | yes |
| 720-947 | Lumen | DENVER | – | yes | yes |
| 720-948 | Verizon | DENVER | 2022-06-22 | yes | yes |
| 720-949 | AT&T | DENVER | – | yes | yes |
| 720-951 | Verizon | DENVER | – | yes | yes |
| 720-952 | Vonage | DECKERS | 2022-06-24 | yes | yes |
| 720-953 | T-Mobile | DENVER | 2022-07-21 | yes | yes |
| 720-954 | Verizon | FORTLUPTON | 2022-09-16 | yes | yes |
| 720-955 | Verizon | DENVER | 2015-07-09 | yes | yes |
| 720-956 | Lumen | DENVER | – | – | yes |
| 720-957 | T-Mobile | DENVER | 2022-01-27 | yes | yes |
| 720-960 | AT&T | DENVER | 2022-08-17 | yes | yes |
| 720-961 | Lumen | DENVER | – | yes | yes |
| 720-962 | Lumen | DENVER | – | – | yes |
| 720-963 | Lumen | DENVER | – | – | yes |
| 720-964 | T-Mobile | LONGMONT | 2022-09-20 | yes | yes |
| 720-965 | T-Mobile | DENVER | 2013-06-07 | yes | yes |
| 720-966 | AT&T | FORTLUPTON | 2014-10-02 | yes | yes |
| 720-967 | LEAP TELECOM, LLC | DENVER | 2022-09-21 | yes | yes |
| 720-968 | AT&T | DENVER | 2022-08-17 | yes | yes |
| 720-969 | AT&T | DENVER | 2022-10-18 | yes | yes |
| 720-970 | Bandwidth | LONGMONT | 2024-04-03 | yes | yes |
| 720-971 | T-Mobile | DENVER | – | yes | yes |
| 720-972 | Lumen | DENVER | 2002-04-23 | – | yes |
| 720-973 | HADLO TECHNOLOGIES, LLC | DENVER | 2023-03-06 | yes | yes |
| 720-974 | Allstream | DENVER | – | yes | yes |
| 720-975 | Allstream | DENVER | – | yes | yes |
| 720-977 | Lumen | DENVER | – | – | yes |
| 720-978 | NUSO, LLC | DENVER | 2022-11-15 | yes | yes |
| 720-979 | T-Mobile | DENVER | – | yes | yes |
| 720-980 | T-Mobile | DENVER | – | yes | yes |
| 720-981 | Lumen | DENVER | – | – | yes |
| 720-982 | T-Mobile | DENVER | – | yes | yes |
| 720-983 | AT&T | DENVER | 2023-05-25 | yes | yes |
| 720-984 | T-Mobile | DENVER | – | yes | yes |
| 720-985 | T-Mobile | DENVER | – | yes | yes |
| 720-986 | Bandwidth | LONGMONT | 2022-10-18 | yes | yes |
| 720-987 | T-Mobile | DENVER | – | yes | yes |
| 720-988 | T-Mobile | DENVER | – | yes | yes |
| 720-989 | T-Mobile | DENVER | – | yes | yes |
| 720-990 | Lumen | DENVER | 2015-07-21 | yes | yes |
| 720-991 | COMMIO, LLC | DECKERS | 2022-10-05 | yes | yes |
| 720-992 | AT&T | DENVER | 2018-01-11 | yes | yes |
| 720-993 | AT&T | DENVER | 2022-10-18 | yes | yes |
| 720-994 | T-Mobile | DENVER | 2022-11-23 | yes | yes |
| 720-995 | EON TELECOM, INC. | DENVER | 2022-12-28 | yes | yes |
| 720-996 | COMMIO, LLC | DENVER | 2017-03-15 | yes | yes |
| 720-997 | Comcast | BENNETT | 2022-03-25 | yes | yes |
| 720-998 | Comcast | DENVER | 2006-12-01 | yes | yes |
| 720-999 | T-Mobile | DENVER | 2008-07-22 | yes | yes |
Frequently asked
How many prefixes does area code 720 have?
785 NXX blocks are assigned of 786 possible. Each block is 10,000 consecutive numbers, so the code currently covers about 7,850 thousand-number ranges across 12 rate centers.
What do the first three digits after 720 tell me?
They identify the block, which tells you the rate center it was allocated to and the carrier that received it. They do not tell you who serves the number today: portability moves numbers between carriers, and pooling splits a block between several of them.
Is a 720 prefix tied to a specific town?
To a rate center, which is billing geography rather than a town. NANPA abbreviates rate center names to ten characters and in large metros uses zone codes, so the name is a NANPA label, not a place name.
What does “pooled” mean in the 720 table?
That the block is in thousands-block pooling: carriers draw 1,000-number lots from it instead of taking all 10,000. 653 of 720's blocks are pooled, which is how regulators slowed down area code exhaustion – and why one prefix can belong to several carriers.
Source and limits
NANPA CO Code Assignment Records, all states, utilized codes, file updated 11/01/2026 – the rows where the record's Use field is “AS” (assigned). Unavailable codes are excluded. The records say who received a block and when, not who serves a particular number today.
More about this code: overview · carriers · spam complaints · local time