All assignees
800 prefixes in 720 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 720-300 | DENVER | 6529 | — | Yes |
| 720-301 | DENVER | 6529 | — | Yes |
| 720-302 | DENVER | 7378 | — | Yes |
| 720-303 | DENVER | 078F | 2024-02-13 | Yes |
| 720-304 | DENVER | 9636 | — | Yes |
| 720-305 | DENVER | 4574 | 2001-01-29 | Yes |
| 720-306 | DENVER | 3467 | 2001-01-29 | Yes |
| 720-307 | ALLNSPKLYN | 7421 | 2012-08-02 | Yes |
| 720-308 | DENVER | 6010 | 2001-08-14 | — |
| 720-309 | DENVER | 6010 | 2001-12-05 | — |
| 720-310 | ALLNSPKLYN | 7378 | — | Yes |
| 720-311 | XXXXXXXXXX | MULT | — | — |
| 720-312 | DENVER | 6529 | 2001-02-20 | Yes |
| 720-313 | DENVER | 6529 | 2001-02-20 | Yes |
| 720-314 | DENVER | 6529 | 2001-02-20 | Yes |
| 720-315 | DENVER | 026D | 2009-10-14 | Yes |
| 720-316 | DENVER | 078F | 2010-05-24 | Yes |
| 720-317 | DENVER | 6529 | — | Yes |
| 720-318 | DENVER | 6529 | — | Yes |
| 720-319 | DENVER | 6529 | 2001-04-19 | Yes |
| 720-320 | DENVER | 6010 | — | — |
| 720-321 | DENVER | 9636 | 2008-05-29 | Yes |
| 720-322 | DENVER | 9636 | — | Yes |
| 720-323 | DENVER | 6529 | — | — |
| 720-324 | DENVER | 318J | — | Yes |
| 720-325 | DENVER | 6529 | 2010-08-06 | Yes |
| 720-326 | DENVER | 6010 | 2011-06-13 | Yes |
| 720-327 | DENVER | 6010 | 2001-10-18 | — |
| 720-328 | DENVER | 318J | 2009-10-20 | Yes |
| 720-329 | DENVER | 6010 | 2001-10-18 | — |
| 720-330 | DENVER | 6118 | — | Yes |
| 720-331 | DENVER | 6529 | — | Yes |
| 720-332 | DENVER | 7229 | — | — |
| 720-333 | DENVER | 6529 | 2001-05-14 | Yes |
| 720-334 | DENVER | 6529 | 2001-05-14 | Yes |
| 720-335 | DENVER | 6529 | 2001-05-14 | Yes |
| 720-336 | KEENESBURG | 078F | 2010-07-19 | Yes |
| 720-337 | DENVER | 9636 | 2009-02-18 | Yes |
| 720-338 | DENVER | 6010 | 2001-11-19 | — |
| 720-339 | DENVER | 6529 | — | Yes |
| 720-340 | LONGMONT | 6567 | 2009-09-04 | Yes |
| 720-341 | DENVER | 6529 | — | — |
| 720-342 | DENVER | 7378 | 2009-04-15 | Yes |
| 720-343 | DENVER | 6118 | 2003-10-31 | Yes |
| 720-344 | DENVER | 9636 | — | — |
| 720-345 | DENVER | 588A | 2007-12-28 | Yes |
| 720-346 | DENVER | 6567 | — | Yes |
| 720-347 | DENVER | 4574 | 2009-09-28 | Yes |
| 720-348 | DENVER | 9636 | — | — |
| 720-349 | DENVER | 7378 | 2011-03-28 | Yes |
| 720-350 | DENVER | 6529 | — | Yes |
| 720-351 | DENVER | 6529 | — | Yes |
| 720-352 | DENVER | 6529 | — | — |
| 720-353 | DENVER | 6529 | — | Yes |
| 720-354 | DENVER | 4574 | 2011-06-30 | Yes |
| 720-355 | DENVER | 6567 | 2012-08-16 | Yes |
| 720-356 | DENVER | 7378 | — | Yes |
| 720-357 | DENVER | 6010 | 2012-07-05 | Yes |
| 720-358 | HUDSON | 7229 | 2009-09-09 | Yes |
| 720-359 | DENVER | 9636 | — | — |
| 720-360 | DENVER | 6010 | 2013-01-28 | Yes |
| 720-361 | DENVER | 3467 | 2013-07-03 | Yes |
| 720-362 | DENVER | 9636 | 2007-06-06 | Yes |
| 720-363 | DENVER | 5562 | — | Yes |
| 720-364 | DENVER | 6010 | 2002-01-15 | — |
| 720-365 | DENVER | 6010 | 2002-01-15 | — |
| 720-366 | DENVER | 6010 | 2002-01-15 | — |
| 720-367 | DENVER | 7229 | — | Yes |
| 720-368 | DENVER | 7229 | 2004-04-30 | Yes |
| 720-369 | DENVER | 6010 | 2011-03-14 | Yes |
| 720-370 | DENVER | 078F | 2013-01-04 | Yes |
| 720-371 | DENVER | 6529 | — | Yes |
| 720-372 | DENVER | 6529 | 2013-09-09 | Yes |
| 720-373 | DENVER | 6529 | — | Yes |
| 720-374 | DENVER | 9636 | — | — |
| 720-375 | DENVER | 6010 | 2007-07-10 | Yes |
| 720-376 | DENVER | 3467 | 2012-11-12 | Yes |
| 720-377 | DENVER | 7229 | — | Yes |
| 720-378 | LONGMONT | 6010 | 2010-01-19 | Yes |
| 720-379 | DENVER | 6118 | — | Yes |
| 720-380 | DENVER | 6529 | 2013-02-01 | Yes |
| 720-381 | DENVER | 318J | 2005-08-03 | Yes |
| 720-382 | DENVER | 3467 | — | Yes |
| 720-383 | FORTLUPTON | 6567 | 2008-11-13 | Yes |
| 720-384 | DENVER | 7229 | — | Yes |
| 720-385 | DENVER | 7229 | — | Yes |
| 720-386 | GEORGETOWN | 078F | 2012-12-03 | Yes |
| 720-387 | DENVER | 4574 | 2012-09-04 | Yes |
| 720-388 | DENVER | 6567 | 2010-01-11 | Yes |
| 720-389 | DENVER | 7229 | 2008-11-17 | Yes |
| 720-390 | DENVER | 6567 | — | Yes |
| 720-391 | DENVER | 6567 | 2013-07-12 | Yes |
| 720-392 | DEER TRAIL | 6567 | 2009-01-30 | Yes |
| 720-393 | DENVER | 4574 | 2010-06-07 | Yes |
| 720-394 | DENVER | 6529 | — | — |
| 720-395 | DENVER | 7421 | 2009-09-04 | Yes |
| 720-396 | DENVER | 7421 | 2009-09-08 | Yes |
| 720-397 | DENVER | 7421 | 2009-09-08 | Yes |
| 720-398 | DENVER | 6010 | 2010-06-28 | Yes |
| 720-399 | DENVER | 6118 | 2011-05-06 | 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.