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55 prefixes in 720 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 720-288 | DENVER | 078F | 2010-02-26 | Yes |
| 720-295 | DENVER | 078F | 2010-03-01 | Yes |
| 720-303 | DENVER | 078F | 2024-02-13 | Yes |
| 720-316 | DENVER | 078F | 2010-05-24 | Yes |
| 720-336 | KEENESBURG | 078F | 2010-07-19 | Yes |
| 720-370 | DENVER | 078F | 2013-01-04 | Yes |
| 720-386 | GEORGETOWN | 078F | 2012-12-03 | Yes |
| 720-408 | DENVER | 078F | 2012-11-15 | Yes |
| 720-432 | DENVER | 078F | 2010-02-26 | Yes |
| 720-441 | DENVER | 078F | 2011-05-18 | Yes |
| 720-442 | LONGMONT | 078F | 2011-04-04 | Yes |
| 720-443 | DENVER | 078F | 2010-10-07 | Yes |
| 720-464 | DENVER | 078F | 2011-04-21 | Yes |
| 720-504 | DENVER | 078F | 2013-05-24 | Yes |
| 720-507 | DENVER | 078F | 2014-10-30 | Yes |
| 720-515 | DENVER | 078F | 2010-02-11 | Yes |
| 720-547 | KEENESBURG | 078F | 2018-03-30 | Yes |
| 720-574 | DENVER | 078F | 2018-06-29 | Yes |
| 720-580 | KEENESBURG | 078F | 2013-03-15 | Yes |
| 720-598 | DENVER | 078F | 2015-02-26 | Yes |
| 720-604 | DENVER | 078F | 2022-12-16 | Yes |
| 720-608 | GEORGETOWN | 078F | 2010-07-19 | Yes |
| 720-615 | KEENESBURG | 078F | 2020-08-17 | Yes |
| 720-619 | GEORGETOWN | 078F | 2014-03-25 | Yes |
| 720-649 | GEORGETOWN | 078F | 2018-08-30 | Yes |
| 720-657 | DENVER | 078F | 2019-02-25 | Yes |
| 720-663 | DENVER | 078F | 2008-05-28 | Yes |
| 720-683 | FORTLUPTON | 078F | 2013-05-15 | Yes |
| 720-689 | DENVER | 078F | 2011-04-04 | Yes |
| 720-696 | DENVER | 078F | 2015-06-01 | Yes |
| 720-712 | FORTLUPTON | 078F | 2019-06-20 | Yes |
| 720-715 | DECKERS | 078F | 2019-02-08 | Yes |
| 720-719 | DENVER | 078F | 2024-04-03 | Yes |
| 720-727 | LONGMONT | 078F | 2018-06-12 | Yes |
| 720-729 | KEENESBURG | 078F | 2012-03-02 | Yes |
| 720-739 | DENVER | 078F | 2014-04-29 | Yes |
| 720-743 | LONGMONT | 078F | 2020-09-21 | Yes |
| 720-759 | LONGMONT | 078F | 2016-08-10 | Yes |
| 720-770 | DECKERS | 078F | 2014-09-30 | Yes |
| 720-778 | DENVER | 078F | 2014-09-30 | Yes |
| 720-779 | DENVER | 078F | 2019-06-12 | Yes |
| 720-797 | KEENESBURG | 078F | 2019-05-22 | Yes |
| 720-798 | DENVER | 078F | 2020-04-21 | Yes |
| 720-808 | DENVER | 078F | 2010-10-20 | Yes |
| 720-853 | LONGMONT | 078F | 2021-10-25 | Yes |
| 720-861 | GEORGETOWN | 078F | 2021-10-26 | Yes |
| 720-881 | DENVER | 078F | — | Yes |
| 720-892 | DENVER | 078F | 2018-03-20 | Yes |
| 720-893 | ALLNSPKLYN | 078F | 2014-08-08 | Yes |
| 720-894 | DECKERS | 078F | 2021-10-25 | Yes |
| 720-909 | DENVER | 078F | — | Yes |
| 720-927 | LONGMONT | 078F | 2019-03-27 | Yes |
| 720-928 | FORTLUPTON | 078F | 2018-05-15 | Yes |
| 720-970 | LONGMONT | 078F | 2024-04-03 | Yes |
| 720-986 | LONGMONT | 078F | 2022-10-18 | Yes |
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.