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 |
|---|---|---|---|---|---|---|
| 2022-04-14 | 251-392 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX9XXX · 3 holders which blocks → | METROPCS, INC. | 5562 | ATMORE | AL |
| 2022-03-09 | 251-384 | 0–9 XXXall 10 · 3 holders which blocks → | METROPCS, INC. | 5562 | MOBILE | AL |
| 2016-05-09 | 251-930 | 0–9 XXXall 10 · 6 holders which blocks → | METROPCS, INC. | 5562 | MOBILE | AL |
| 2007-01-05 | 251-200 | 0–9 XXXall 10 · 5 holders which blocks → | METROPCS, INC. | 5562 | FOLEY | AL |
| 2006-03-30 | 251-655 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | METROPCS, INC. | 5562 | ATMORE | AL |
| 2006-02-23 | 251-644 | 0–9 XXXall 10 · 4 holders which blocks → | METROPCS, INC. | 5562 | MOBILE | AL |
| 2002-03-11 | 251-382 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → | METROPCS, INC. | 5562 | MOBILE | AL |
| 2001-01-25 | 251-716 | 4XXX5XXX7XXX8XXX · 2 holders which blocks → | METROPCS, INC. | 5562 | FAIRHOPE | AL |
| — | 251-379 | 2XXX3XXX5XXX · 2 holders which blocks → | METROPCS, INC. | 5562 | MOBILE | AL |
| — | 251-518 | 3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | METROPCS, INC. | 5562 | MOBILE | AL |
| — | 251-583 | none assigned yet which blocks → | METROPCS, INC. | 5562 | MOBILE | AL |
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.