NumberResearchRecent prefix assignments
0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/21/2026
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 |
|---|---|---|---|---|---|---|
| — | 406-228 | 5XXX which blocks → | NEMONT TEL COOP INC | 2247 | GLASGOW | MT |
| — | 406-286 | none assigned yet which blocks → | NEMONT TEL COOP INC | 2247 | RESERVE | MT |
| — | 406-364 | not yet reported which blocks → | NEMONT TEL COOP INC | 2247 | HINSDALE | MT |
| — | 406-367 | not yet reported which blocks → | NEMONT TEL COOP INC | 2247 | NO GLASGOW | MT |
| — | 406-385 | none assigned yet which blocks → | NEMONT TEL COOP INC | 2247 | WESTBY | MT |
| — | 406-392 | none assigned yet which blocks → | NEMONT TEL COOP INC | 2247 | NO WOLF PT | MT |
| — | 406-448 | 8XXX which blocks → | NEMONT TEL COOP INC | 2247 | NO POPLAR | MT |
| — | 406-474 | not yet reported which blocks → | NEMONT TEL COOP INC | 2247 | FLAXVILLE | MT |
| — | 406-483 | not yet reported which blocks → | NEMONT TEL COOP INC | 2247 | DAGMAR | MT |
| — | 406-487 | none assigned yet which blocks → | NEMONT TEL COOP INC | 2247 | SCOBEY | MT |
| — | 406-524 | none assigned yet which blocks → | NEMONT TEL COOP INC | 2247 | VLINSTRLPK | MT |
| — | 406-526 | none assigned yet which blocks → | NEMONT TEL COOP INC | 2247 | FORT PECK | MT |
| — | 406-527 | 6XXX which blocks → | NEMONT TEL COOP INC | 2247 | SACO | MT |
| — | 406-648 | none assigned yet which blocks → | NEMONT TEL COOP INC | 2247 | NOHINSDALE | MT |
| — | 406-653 | none assigned yet which blocks → | NEMONT TEL COOP INC | 2247 | WOLF POINT | MT |
| — | 406-695 | none assigned yet which blocks → | NEMONT TEL COOP INC | 2247 | FRAZER | MT |
| — | 406-724 | none assigned yet which blocks → | NEMONT TEL COOP INC | 2247 | GLENTANA | MT |
| — | 406-725 | not yet reported which blocks → | NEMONT TEL COOP INC | 2247 | LARSLAN | MT |
| — | 406-746 | not yet reported which blocks → | NEMONT TEL COOP INC | 2247 | NASHUA | MT |
| — | 406-762 | none assigned yet which blocks → | NEMONT TEL COOP INC | 2247 | OPHEIM | MT |
| — | 406-765 | 5XXX6XXX · 2 holders which blocks → | NEMONT TEL COOP INC | 2247 | PLENTYWOOD | MT |
| — | 406-766 | not yet reported which blocks → | NEMONT TEL COOP INC | 2247 | FROID | MT |
| — | 406-768 | none assigned yet which blocks → | NEMONT TEL COOP INC | 2247 | POPLAR | MT |
| — | 406-769 | 3XXX which blocks → | NEMONT TEL COOP INC | 2247 | BAINVILLE | MT |
| — | 406-779 | 9XXX which blocks → | NEMONT TEL COOP INC | 2247 | FLAXVLRURL | MT |
| — | 406-783 | none assigned yet which blocks → | NEMONT TEL COOP INC | 2247 | SCOBEYRURL | MT |
| — | 406-785 | 4XXX which blocks → | NEMONT TEL COOP INC | 2247 | NO NASHUA | MT |
| — | 406-786 | none assigned yet which blocks → | NEMONT TEL COOP INC | 2247 | BROCKTON | MT |
| — | 406-787 | 8XXX which blocks → | NEMONT TEL COOP INC | 2247 | CULBERTSON | MT |
| — | 406-789 | none assigned yet which blocks → | NEMONT TEL COOP INC | 2247 | MEDICINELK | MT |
| — | 406-893 | none assigned yet which blocks → | NEMONT TEL COOP INC | 2247 | PEERLESS | MT |
| — | 406-895 | none assigned yet which blocks → | NEMONT TEL COOP INC | 2247 | OUTLOOK | MT |
| — | 406-963 | none assigned yet which blocks → | NEMONT TEL COOP INC | 2247 | FROIDRURAL | MT |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/21/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.