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 |
|---|---|---|---|---|---|---|
| 2002-02-25 | 740-222 | 1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 2 holders which blocks → | METROPCS, INC. | 5562 | WAVERLY | OH |
| 2001-11-14 | 740-237 | 1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → | METROPCS, INC. | 5562 | IRONTON | OH |
| — | 740-253 | 3XXX4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → | METROPCS, INC. | 5562 | CHILLICOTH | OH |
| — | 740-296 | 1XXX3XXX4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → | METROPCS, INC. | 5562 | STCLAIRSVL | OH |
| — | 740-479 | 3XXX4XXX5XXX8XXX9XXX · 3 holders which blocks → | METROPCS, INC. | 5562 | IRONTON | OH |
| — | 740-550 | none assigned yet which blocks → | METROPCS, INC. | 5562 | IRONTON | OH |
| — | 740-627 | 3XXX4XXX5XXX8XXX9XXX · 2 holders which blocks → | METROPCS, INC. | 5562 | MT VERNON | OH |
| — | 740-709 | none assigned yet which blocks → | METROPCS, INC. | 5562 | GALLIPOLIS | OH |
| — | 740-837 | 2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 6 holders which blocks → | METROPCS, INC. | 5562 | LONDON | OH |
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.