All assignees
59 prefixes in 983 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 983-200 | LONGMONT | 732J | 2023-04-07 | Yes |
| 983-201 | DENVER | 7378 | 2023-09-06 | Yes |
| 983-202 | DENVER | 0051 | 2024-01-23 | — |
| 983-203 | DENVER | 026D | 2024-02-15 | Yes |
| 983-204 | DENVER | 026D | 2024-08-22 | Yes |
| 983-205 | STRASBURG | 0051 | 2024-09-05 | — |
| 983-206 | FORTLUPTON | 0051 | 2024-09-05 | — |
| 983-207 | LONGMONT | 026D | 2024-09-11 | Yes |
| 983-208 | DENVER | 6010 | 2024-09-11 | Yes |
| 983-209 | FORTLUPTON | 6529 | 2024-09-12 | Yes |
| 983-210 | DENVER | 078F | 2024-09-20 | Yes |
| 983-211 | XXXXXXXXXX | MULT | — | — |
| 983-212 | DENVER | 026D | 2024-09-27 | Yes |
| 983-213 | LONGMONT | 6010 | 2024-11-15 | Yes |
| 983-214 | DENVER | 624H | 2025-01-27 | Yes |
| 983-215 | DENVER | 6010 | 2025-02-20 | Yes |
| 983-216 | DENVER | 026D | 2025-03-14 | Yes |
| 983-217 | DENVER | 6567 | 2025-03-28 | Yes |
| 983-218 | DENVER | 6567 | 2025-06-26 | Yes |
| 983-219 | DENVER | 700J | 2025-07-02 | Yes |
| 983-220 | DENVER | 053L | 2025-07-16 | Yes |
| 983-221 | DECKERS | 026D | 2025-12-11 | Yes |
| 983-222 | ROGGEN | 616J | 2023-05-09 | Yes |
| 983-223 | LONGMONT | 026D | 2026-01-27 | Yes |
| 983-224 | DENVER | 671J | 2026-02-20 | Yes |
| 983-225 | DENVER | 026D | 2026-04-27 | Yes |
| 983-226 | LONGMONT | 026D | 2025-09-24 | Yes |
| 983-227 | FORTLUPTON | 883K | 2025-11-18 | Yes |
| 983-228 | DENVER | 6010 | 2026-05-06 | Yes |
| 983-229 | DENVER | 026D | 2026-08-21 | Yes |
| 983-230 | LONGMONT | 026D | 2026-08-26 | Yes |
| 983-233 | DENVER | 597F | 2026-05-14 | Yes |
| 983-277 | DENVER | 824J | 2026-01-16 | Yes |
| 983-311 | XXXXXXXXXX | MULT | — | — |
| 983-333 | DENVER | 557H | 2023-12-15 | Yes |
| 983-411 | XXXXXXXXXX | MULT | — | — |
| 983-444 | DENVER | 557H | 2024-01-31 | Yes |
| 983-456 | DENVER | 7378 | 2025-10-08 | Yes |
| 983-500 | STRASBURG | 557H | 2026-02-04 | Yes |
| 983-511 | XXXXXXXXXX | MULT | — | — |
| 983-555 | DIR ASST | MULT | — | — |
| 983-587 | DENVER | 824J | 2026-03-19 | Yes |
| 983-611 | XXXXXXXXXX | MULT | — | — |
| 983-700 | — | — | ||
| 983-711 | XXXXXXXXXX | MULT | — | — |
| 983-777 | DENVER | 557H | 2023-10-03 | Yes |
| 983-800 | DENVER | 557H | 2026-06-16 | Yes |
| 983-811 | XXXXXXXXXX | MULT | — | — |
| 983-880 | DENVER | 193E | 2026-09-11 | Yes |
| 983-888 | DENVER | 557H | 2023-06-02 | Yes |
| 983-900 | DENVER | 883K | 2025-11-13 | Yes |
| 983-911 | XXXXXXXXXX | MULT | — | — |
| 983-950 | — | — | ||
| 983-955 | DENVER | 907K | 2025-09-02 | Yes |
| 983-958 | — | — | ||
| 983-959 | — | — | ||
| 983-976 | — | — | ||
| 983-983 | LONGMONT | 624H | 2023-03-29 | Yes |
| 983-999 | DENVER | 557H | 2023-08-08 | 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.