SPOK, INC.
13 prefixes in 773 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 773-201 | CHICGOZN01 | 6630 | — | — |
| 773-212 | CHICGOZN03 | 6630 | — | — |
| 773-214 | CHICGOZN01 | 6630 | — | — |
| 773-215 | CHICGOZN01 | 6630 | — | — |
| 773-222 | CHICGOZN01 | 6630 | — | — |
| 773-223 | CHICGOZN06 | 6630 | — | — |
| 773-228 | CHICGOZN01 | 6630 | — | — |
| 773-258 | CHICGOZN01 | 6630 | — | — |
| 773-393 | CHICGOZN01 | 6630 | — | — |
| 773-438 | CHICGOZN01 | 6630 | — | — |
| 773-464 | CHICGOZN01 | 6630 | — | — |
| 773-566 | CHICGOZN01 | 6630 | — | — |
| 773-652 | CHICGOZN01 | 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.