All assignees
800 prefixes in 720 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 720-500 | DENVER | 278F | 2014-10-07 | Yes |
| 720-501 | DENVER | 5562 | 2014-08-28 | Yes |
| 720-502 | DENVER | 318J | 2012-11-15 | Yes |
| 720-503 | DENVER | 6010 | 2014-10-02 | Yes |
| 720-504 | DENVER | 078F | 2013-05-24 | Yes |
| 720-505 | DENVER | 6567 | 2011-01-11 | Yes |
| 720-506 | DENVER | 6118 | 2001-12-17 | Yes |
| 720-507 | DENVER | 078F | 2014-10-30 | Yes |
| 720-508 | DENVER | 3467 | 2012-06-26 | Yes |
| 720-509 | DENVER | 7229 | 2010-04-02 | Yes |
| 720-510 | DENVER | 318J | 2017-06-13 | Yes |
| 720-511 | XXXXXXXXXX | MULT | — | — |
| 720-512 | DENVER | 318J | 2016-05-09 | Yes |
| 720-513 | DENVER | 026D | 2017-08-25 | Yes |
| 720-514 | DENVER | 7378 | — | Yes |
| 720-515 | DENVER | 078F | 2010-02-11 | Yes |
| 720-516 | DENVER | 9636 | 2017-07-21 | Yes |
| 720-517 | DENVER | 6010 | 2015-06-30 | Yes |
| 720-518 | DENVER | 3467 | 2014-05-16 | Yes |
| 720-519 | DENVER | 7378 | — | Yes |
| 720-520 | DENVER | 624H | 2016-05-13 | Yes |
| 720-521 | DENVER | 9748 | — | — |
| 720-522 | DENVER | 7229 | 2010-11-19 | Yes |
| 720-523 | DENVER | 9636 | 2010-05-24 | Yes |
| 720-524 | DENVER | 9636 | — | Yes |
| 720-525 | DENVER | 6529 | 2013-04-02 | Yes |
| 720-526 | LONGMONT | 6010 | 2014-06-12 | Yes |
| 720-527 | DENVER | 567G | 2017-10-27 | Yes |
| 720-528 | DENVER | 9636 | — | — |
| 720-529 | DENVER | 9636 | — | — |
| 720-530 | DENVER | 6010 | — | — |
| 720-531 | DENVER | 318J | 2016-08-16 | Yes |
| 720-532 | DENVER | 7378 | — | Yes |
| 720-533 | DENVER | 7378 | — | — |
| 720-534 | LONGMONT | 197D | 2016-08-31 | Yes |
| 720-535 | DENVER | 7378 | — | Yes |
| 720-536 | DENVER | 9636 | — | Yes |
| 720-537 | DENVER | 330B | 2014-10-22 | Yes |
| 720-538 | FORTLUPTON | 6567 | 2012-09-24 | Yes |
| 720-539 | DENVER | 6010 | 2011-07-08 | Yes |
| 720-540 | DENVER | 9636 | — | — |
| 720-541 | DENVER | 6567 | 2012-09-28 | Yes |
| 720-542 | DENVER | 9636 | — | Yes |
| 720-543 | DENVER | 278F | 2016-10-14 | Yes |
| 720-544 | DENVER | 9636 | — | Yes |
| 720-545 | DENVER | 6118 | 2009-06-12 | Yes |
| 720-546 | DENVER | 6529 | 2016-08-23 | Yes |
| 720-547 | KEENESBURG | 078F | 2018-03-30 | Yes |
| 720-548 | DENVER | 6118 | — | Yes |
| 720-549 | DENVER | 6118 | — | Yes |
| 720-550 | DENVER | 829J | 2013-06-25 | Yes |
| 720-551 | DENVER | 6010 | 2011-04-01 | Yes |
| 720-552 | LONGMONT | 6567 | 2012-11-16 | Yes |
| 720-553 | DENVER | 9636 | 2012-06-22 | Yes |
| 720-554 | DENVER | 9636 | — | — |
| 720-555 | DIR ASST | MULT | — | — |
| 720-556 | DENVER | 6567 | 2011-05-10 | Yes |
| 720-557 | DENVER | 6567 | 2013-06-12 | Yes |
| 720-558 | DENVER | 9636 | 2002-03-13 | — |
| 720-559 | DENVER | 7378 | — | — |
| 720-560 | DENVER | 6010 | — | — |
| 720-561 | DENVER | 9636 | 2008-04-18 | Yes |
| 720-562 | DENVER | 9636 | — | — |
| 720-563 | DENVER | 9636 | — | Yes |
| 720-564 | DENVER | 9636 | — | — |
| 720-565 | DENVER | 9636 | — | — |
| 720-566 | DENVER | 9636 | — | — |
| 720-567 | DENVER | 6118 | — | — |
| 720-568 | DENVER | 9636 | 2001-02-27 | Yes |
| 720-569 | DENVER | 6010 | 2008-10-08 | Yes |
| 720-570 | DENVER | 9636 | — | Yes |
| 720-571 | ALLNSPKLYN | 026D | 2016-03-01 | Yes |
| 720-572 | DENVER | 7378 | 2016-12-14 | Yes |
| 720-573 | DENVER | 4574 | 2014-10-17 | Yes |
| 720-574 | DENVER | 078F | 2018-06-29 | Yes |
| 720-575 | DENVER | 026D | 2014-11-11 | Yes |
| 720-576 | DENVER | 6567 | 2016-11-09 | Yes |
| 720-577 | DENVER | 6118 | 2014-07-03 | Yes |
| 720-578 | DENVER | 9636 | — | — |
| 720-579 | DENVER | 7229 | — | Yes |
| 720-580 | KEENESBURG | 078F | 2013-03-15 | Yes |
| 720-581 | DENVER | 6529 | — | Yes |
| 720-582 | DENVER | 6567 | 2015-11-12 | Yes |
| 720-583 | DENVER | 026D | 2010-09-30 | Yes |
| 720-584 | DENVER | 6567 | 2014-10-21 | Yes |
| 720-585 | DENVER | 6529 | 2012-11-02 | Yes |
| 720-586 | DENVER | 5562 | 2017-05-25 | Yes |
| 720-587 | DENVER | 7378 | — | Yes |
| 720-588 | DENVER | 551G | 2012-10-17 | Yes |
| 720-589 | DENVER | 6529 | 2013-04-30 | Yes |
| 720-590 | DENVER | 026D | 2013-02-05 | Yes |
| 720-591 | DENVER | 6567 | 2016-09-15 | Yes |
| 720-592 | DENVER | 6529 | 2016-12-08 | Yes |
| 720-593 | DENVER | 4574 | 2014-04-02 | Yes |
| 720-594 | DENVER | 019J | 2017-06-30 | Yes |
| 720-595 | DENVER | 6118 | 2016-05-10 | Yes |
| 720-596 | DENVER | 7378 | — | Yes |
| 720-597 | LONGMONT | 6567 | 2016-01-11 | Yes |
| 720-598 | DENVER | 078F | 2015-02-26 | Yes |
| 720-599 | DENVER | 3467 | 2012-02-13 | 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.