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 |
|---|---|---|---|---|---|---|
| — | 575-279 | not yet reported which blocks → | E.N.M.R. TEL COOP | 2262 | HOUSE | NM |
| — | 575-355 | not yet reported which blocks → | E.N.M.R. TEL COOP | 2262 | FORTSUMNER | NM |
| — | 575-357 | not yet reported which blocks → | E.N.M.R. TEL COOP | 2262 | GRADY | NM |
| — | 575-372 | not yet reported which blocks → | E.N.M.R. TEL COOP | 2262 | WEBER CITY | NM |
| — | 575-374 | not yet reported which blocks → | E.N.M.R. TEL COOP | 2262 | CLAYTON | NM |
| — | 575-389 | not yet reported which blocks → | E.N.M.R. TEL COOP | 2262 | PLEASANTHL | NM |
| — | 575-421 | not yet reported which blocks → | E.N.M.R. TEL COOP | 2262 | EL VALLE | NM |
| — | 575-422 | not yet reported which blocks → | E.N.M.R. TEL COOP | 2262 | WHITELAKES | NM |
| — | 575-423 | not yet reported which blocks → | E.N.M.R. TEL COOP | 2262 | BINGHAM | NM |
| — | 575-427 | not yet reported which blocks → | E.N.M.R. TEL COOP | 2262 | ANTONCHICO | NM |
| — | 575-456 | not yet reported which blocks → | E.N.M.R. TEL COOP | 2262 | BELLVIEW | NM |
| — | 575-458 | not yet reported which blocks → | E.N.M.R. TEL COOP | 2262 | RAGLAND | NM |
| — | 575-472 | not yet reported which blocks → | E.N.M.R. TEL COOP | 2262 | SANTA ROSA | NM |
| — | 575-485 | not yet reported which blocks → | E.N.M.R. TEL COOP | 2262 | ROY | NM |
| — | 575-487 | not yet reported which blocks → | E.N.M.R. TEL COOP | 2262 | LOGAN | NM |
| — | 575-576 | not yet reported which blocks → | E.N.M.R. TEL COOP | 2262 | SAN JON | NM |
| — | 575-584 | not yet reported which blocks → | E.N.M.R. TEL COOP | 2262 | VAUGHN | NM |
| — | 575-633 | not yet reported which blocks → | E.N.M.R. TEL COOP | 2262 | NARA VISA | NM |
| — | 575-641 | not yet reported which blocks → | E.N.M.R. TEL COOP | 2262 | TREMENTINA | NM |
| — | 575-673 | not yet reported which blocks → | E.N.M.R. TEL COOP | 2262 | MOSQUERO | NM |
| — | 575-683 | not yet reported which blocks → | E.N.M.R. TEL COOP | 2262 | SO CLOVIS | NM |
| — | 575-849 | not yet reported which blocks → | E.N.M.R. TEL COOP | 2262 | CORONA | NM |
| — | 575-868 | not yet reported which blocks → | E.N.M.R. TEL COOP | 2262 | CONCHASDAM | NM |
| — | 575-985 | not yet reported which blocks → | E.N.M.R. TEL COOP | 2262 | RANCHVALE | NM |
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.