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 |
|---|---|---|---|---|---|---|
| 2010-02-17 | 404-566 | 0–9 XXXall 10 · 3 holders which blocks → | METROPCS, INC. | 5562 | ATLANTA | GA |
| 2008-06-09 | 404-997 | 0–9 XXXall 10 · 4 holders which blocks → | METROPCS, INC. | 5562 | ATLANTA | GA |
| 2006-08-28 | 404-453 | 0–9 XXXwhole prefix which blocks → | METROPCS, INC. | 5562 | ATLANTA | GA |
| 2006-08-28 | 404-492 | 0–9 XXXall 10 · 2 holders which blocks → | METROPCS, INC. | 5562 | ATLANTA | GA |
| 2006-08-28 | 404-645 | 0–9 XXXall 10 · 3 holders which blocks → | METROPCS, INC. | 5562 | ATLANTA | GA |
| 2005-05-31 | 404-552 | 0–9 XXXall 10 · 2 holders which blocks → | METROPCS, INC. | 5562 | ATLANTA | GA |
| 2005-03-29 | 404-604 | 0–9 XXXall 10 · 3 holders which blocks → | METROPCS, INC. | 5562 | ATLANTA | GA |
| 2005-03-22 | 404-437 | 0–9 XXXall 10 · 2 holders which blocks → | METROPCS, INC. | 5562 | ATLANTA | GA |
| 2005-02-09 | 404-551 | 0–9 XXXall 10 · 3 holders which blocks → | METROPCS, INC. | 5562 | ATLANTA | GA |
| 2004-09-27 | 404-380 | 0–9 XXXall 10 · 3 holders which blocks → | METROPCS, INC. | 5562 | ATLANTA | GA |
| 2004-01-29 | 404-399 | 0–9 XXXwhole prefix which blocks → | METROPCS, INC. | 5562 | ATLANTA | GA |
| 2002-11-15 | 404-438 | 0–9 XXXwhole prefix which blocks → | METROPCS, INC. | 5562 | ATLANTA | GA |
| 2002-04-25 | 404-246 | not yet reported which blocks → | METROPCS, INC. | 5562 | ATLANTA | GA |
| 2001-12-19 | 404-447 | 0XXX2XXX3XXX4XXX5XXX7XXX8XXX which blocks → | METROPCS, INC. | 5562 | ATLANTA | GA |
| 2001-11-09 | 404-484 | 0XXX2XXX3XXX4XXX5XXX7XXX8XXX which blocks → | METROPCS, INC. | 5562 | ATLANTA | GA |
| 2001-10-25 | 404-587 | 0XXX2XXX3XXX4XXX5XXX7XXX8XXX which blocks → | METROPCS, INC. | 5562 | ATLANTA | GA |
| 2001-10-18 | 404-454 | not yet reported which blocks → | METROPCS, INC. | 5562 | ATLANTA | GA |
| 2001-10-05 | 404-396 | 0XXX2XXX3XXX4XXX5XXX7XXX8XXX which blocks → | METROPCS, INC. | 5562 | ATLANTA | GA |
| — | 404-957 | 0–9 XXXall 10 · 2 holders which blocks → | METROPCS, INC. | 5562 | ATLANTA | GA |
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.