NumberResearchRecent prefix assignments
0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/20/2026
The Code holder is who opened each NPA-NXX prefix — not necessarily who holds the numbers. A prefix is 10,000 numbers, but under pooling its ten 1,000-number blocks are handed out individually, often to different carriers; the code holder may hold only one block, or none. The Thousands-blocks column shows how the ten blocks are really split — click which blocks → to see who holds each 1,000-number block and its last-4-digit range. Assignments are initial assignments; the current serving carrier may differ due to portability.
| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| 2013-06-04 | 701-418 | not yet reported which blocks → | SRT COMMUNICATIONS, INC. | 3303 | MINOT | ND |
| — | 701-245 | not yet reported which blocks → | SRT COMMUNICATIONS, INC. | 3303 | WESTHOPE | ND |
| — | 701-263 | none assigned yet which blocks → | SRT COMMUNICATIONS, INC. | 3303 | METIGOSHE | ND |
| — | 701-267 | not yet reported which blocks → | SRT COMMUNICATIONS, INC. | 3303 | ANTLER | ND |
| — | 701-268 | not yet reported which blocks → | SRT COMMUNICATIONS, INC. | 3303 | MAXBASS | ND |
| — | 701-272 | none assigned yet which blocks → | SRT COMMUNICATIONS, INC. | 3303 | NEWBURG | ND |
| — | 701-295 | not yet reported which blocks → | SRT COMMUNICATIONS, INC. | 3303 | LANDA | ND |
| — | 701-338 | not yet reported which blocks → | SRT COMMUNICATIONS, INC. | 3303 | VELVA | ND |
| — | 701-362 | not yet reported which blocks → | SRT COMMUNICATIONS, INC. | 3303 | GLENBURN | ND |
| — | 701-386 | not yet reported which blocks → | SRT COMMUNICATIONS, INC. | 3303 | TOLLEY | ND |
| — | 701-420 | not yet reported which blocks → | SRT COMMUNICATIONS, INC. | 3303 | MINOT | ND |
| — | 701-453 | none assigned yet which blocks → | SRT COMMUNICATIONS, INC. | 3303 | BERTHOLD | ND |
| — | 701-459 | not yet reported which blocks → | SRT COMMUNICATIONS, INC. | 3303 | SHERWOOD | ND |
| — | 701-468 | not yet reported which blocks → | SRT COMMUNICATIONS, INC. | 3303 | CARPIO | ND |
| — | 701-482 | not yet reported which blocks → | SRT COMMUNICATIONS, INC. | 3303 | DONNYBROOK | ND |
| — | 701-525 | not yet reported which blocks → | SRT COMMUNICATIONS, INC. | 3303 | KARLSRUHE | ND |
| — | 701-537 | 4XXX which blocks → | SRT COMMUNICATIONS, INC. | 3303 | TOWNER | ND |
| — | 701-624 | not yet reported which blocks → | SRT COMMUNICATIONS, INC. | 3303 | SAWYER | ND |
| — | 701-626 | none assigned yet which blocks → | SRT COMMUNICATIONS, INC. | 3303 | BUTTE | ND |
| — | 701-693 | none assigned yet which blocks → | SRT COMMUNICATIONS, INC. | 3303 | MARTIN | ND |
| — | 701-722 | 7XXX which blocks → | SRT COMMUNICATIONS, INC. | 3303 | SO PRAIRIE | ND |
| — | 701-723 | not yet reported which blocks → | SRT COMMUNICATIONS, INC. | 3303 | MINOT AFB | ND |
| — | 701-725 | not yet reported which blocks → | SRT COMMUNICATIONS, INC. | 3303 | DES LACS | ND |
| — | 701-727 | not yet reported which blocks → | SRT COMMUNICATIONS, INC. | 3303 | MINOT AFB | ND |
| — | 701-728 | not yet reported which blocks → | SRT COMMUNICATIONS, INC. | 3303 | DEERING | ND |
| — | 701-756 | not yet reported which blocks → | SRT COMMUNICATIONS, INC. | 3303 | MOHALL | ND |
| — | 701-768 | not yet reported which blocks → | SRT COMMUNICATIONS, INC. | 3303 | UPHAM | ND |
| — | 701-784 | not yet reported which blocks → | SRT COMMUNICATIONS, INC. | 3303 | LANSFORD | ND |
| — | 701-837 | not yet reported which blocks → | SRT COMMUNICATIONS, INC. | 3303 | MINOT | ND |
| — | 701-838 | not yet reported which blocks → | SRT COMMUNICATIONS, INC. | 3303 | MINOT | ND |
| — | 701-839 | not yet reported which blocks → | SRT COMMUNICATIONS, INC. | 3303 | MINOT | ND |
| — | 701-852 | not yet reported which blocks → | SRT COMMUNICATIONS, INC. | 3303 | MINOT | ND |
| — | 701-857 | not yet reported which blocks → | SRT COMMUNICATIONS, INC. | 3303 | MINOT | ND |
| — | 701-858 | not yet reported which blocks → | SRT COMMUNICATIONS, INC. | 3303 | MINOT | ND |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.