SPOK, INC.
31 prefixes in 303 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 303-201 | DENVER | 6630 | — | — |
| 303-206 | DENVER | 6630 | — | — |
| 303-207 | DENVER | 6630 | — | — |
| 303-208 | DENVER | 6630 | — | — |
| 303-213 | DENVER | 6630 | — | — |
| 303-230 | DENVER | 6630 | — | — |
| 303-240 | DENVER | 6630 | — | — |
| 303-251 | DENVER | 6630 | — | — |
| 303-266 | DENVER | 6630 | — | — |
| 303-461 | DENVER | 6630 | — | — |
| 303-490 | DENVER | 6630 | — | — |
| 303-540 | DENVER | 6630 | — | — |
| 303-553 | DENVER | 6630 | — | — |
| 303-560 | DENVER | 6630 | — | — |
| 303-599 | DENVER | 6630 | — | — |
| 303-609 | DENVER | 6630 | — | — |
| 303-610 | DENVER | 6630 | — | — |
| 303-612 | DENVER | 6630 | — | — |
| 303-613 | DENVER | 6630 | — | — |
| 303-686 | DENVER | 6630 | — | — |
| 303-687 | DENVER | 6630 | — | — |
| 303-760 | DENVER | 6630 | — | — |
| 303-821 | DENVER | 6630 | — | — |
| 303-826 | DENVER | 6630 | — | — |
| 303-851 | DENVER | 6630 | — | — |
| 303-852 | DENVER | 6630 | — | — |
| 303-855 | DENVER | 6630 | — | — |
| 303-878 | DENVER | 6630 | — | — |
| 303-890 | DENVER | 6630 | — | — |
| 303-891 | DENVER | 6630 | — | — |
| 303-897 | DENVER | 6630 | — | — |
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.