SPOK, INC.
28 prefixes in 410 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 410-232 | BALTIMORE | 6630 | — | — |
| 410-283 | TOWSON | 6630 | — | — |
| 410-331 | ELKRIDGE | 6630 | — | — |
| 410-351 | BALTIMORE | 6630 | — | — |
| 410-373 | TOWSON | 6630 | — | — |
| 410-389 | BALTIMORE | 6630 | — | — |
| 410-408 | TOWSON | 6630 | — | — |
| 410-434 | TOWSON | 6630 | — | — |
| 410-445 | BALTIMORE | 6630 | — | — |
| 410-447 | COLUMBIA | 6630 | — | — |
| 410-460 | ELKRIDGE | 6630 | — | — |
| 410-473 | TOWSON | 6630 | — | — |
| 410-475 | TOWSON | 6630 | — | — |
| 410-492 | TOWSON | 6630 | — | — |
| 410-607 | TOWSON | 6630 | — | — |
| 410-640 | BALTIMORE | 6630 | — | — |
| 410-678 | ELKRIDGE | 6630 | — | — |
| 410-681 | TOWSON | 6630 | — | — |
| 410-731 | ANNAPOLIS | 6630 | — | — |
| 410-743 | BALTIMORE | 6630 | — | — |
| 410-748 | ELLICOTTCY | 6630 | — | — |
| 410-806 | TOWSON | 6630 | — | — |
| 410-839 | TOWSON | 6630 | — | — |
| 410-890 | TOWSON | 6630 | — | — |
| 410-894 | TOWSON | 6630 | — | — |
| 410-899 | TOWSON | 6630 | — | — |
| 410-909 | ELKRIDGE | 6630 | — | — |
| 410-932 | ELKRIDGE | 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.