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51 prefixes in 720 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 720-206 | DENVER | 7229 | — | Yes |
| 720-207 | DENVER | 7229 | — | Yes |
| 720-208 | DENVER | 7229 | — | Yes |
| 720-210 | DENVER | 7229 | — | Yes |
| 720-212 | DENVER | 7229 | — | Yes |
| 720-221 | DENVER | 7229 | — | — |
| 720-222 | DENVER | 7229 | — | — |
| 720-223 | DENVER | 7229 | — | Yes |
| 720-224 | DENVER | 7229 | — | Yes |
| 720-225 | DENVER | 7229 | — | Yes |
| 720-226 | DENVER | 7229 | — | Yes |
| 720-227 | DENVER | 7229 | — | Yes |
| 720-228 | DENVER | 7229 | — | — |
| 720-229 | DENVER | 7229 | — | Yes |
| 720-240 | DENVER | 7229 | — | Yes |
| 720-241 | DENVER | 7229 | — | Yes |
| 720-246 | DENVER | 7229 | — | Yes |
| 720-247 | DENVER | 7229 | 2004-05-20 | Yes |
| 720-249 | DENVER | 7229 | — | Yes |
| 720-250 | DENVER | 7229 | — | Yes |
| 720-257 | DENVER | 7229 | — | Yes |
| 720-265 | DENVER | 7229 | 2004-05-03 | Yes |
| 720-284 | DENVER | 7229 | — | Yes |
| 720-293 | DENVER | 7229 | — | — |
| 720-294 | DENVER | 7229 | — | — |
| 720-332 | DENVER | 7229 | — | — |
| 720-358 | HUDSON | 7229 | 2009-09-09 | Yes |
| 720-367 | DENVER | 7229 | — | Yes |
| 720-368 | DENVER | 7229 | 2004-04-30 | Yes |
| 720-377 | DENVER | 7229 | — | Yes |
| 720-384 | DENVER | 7229 | — | Yes |
| 720-385 | DENVER | 7229 | — | Yes |
| 720-389 | DENVER | 7229 | 2008-11-17 | Yes |
| 720-418 | DENVER | 7229 | 2014-03-12 | Yes |
| 720-446 | DENVER | 7229 | 2011-02-23 | Yes |
| 720-449 | DENVER | 7229 | — | Yes |
| 720-450 | DENVER | 7229 | 2014-01-08 | Yes |
| 720-462 | DENVER | 7229 | 2016-11-23 | Yes |
| 720-509 | DENVER | 7229 | 2010-04-02 | Yes |
| 720-522 | DENVER | 7229 | 2010-11-19 | Yes |
| 720-579 | DENVER | 7229 | — | Yes |
| 720-613 | HUDSON | 7229 | 2013-03-01 | Yes |
| 720-631 | DENVER | 7229 | 2017-04-03 | Yes |
| 720-634 | DENVER | 7229 | 2012-11-16 | Yes |
| 720-676 | DENVER | 7229 | 2016-08-29 | Yes |
| 720-686 | DENVER | 7229 | 2010-10-14 | Yes |
| 720-695 | DENVER | 7229 | 2014-08-12 | Yes |
| 720-773 | DENVER | 7229 | 2015-02-09 | Yes |
| 720-862 | DENVER | 7229 | — | Yes |
| 720-863 | DENVER | 7229 | — | Yes |
| 720-889 | DENVER | 7229 | — | — |
These are initial assignees from NANPA CO-code records — because of number portability, the current serving carrier of individual numbers may differ. Bulk export requires a membership.