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 |
|---|---|---|---|---|---|---|
| 2021-10-13 | 505-498 | 0–9 XXXall 10 · 6 holders which blocks → | METROPCS, INC. | 5562 | LAS VEGAS | NM |
| 2021-09-08 | 505-496 | 0–9 XXXall 10 · 7 holders which blocks → | METROPCS, INC. | 5562 | GRANTS | NM |
| 2020-07-14 | 505-416 | 0–9 XXXall 10 · 6 holders which blocks → | METROPCS, INC. | 5562 | SANTA FE | NM |
| 2020-01-17 | 505-230 | 0–9 XXXall 10 · 5 holders which blocks → | METROPCS, INC. | 5562 | SANTA FE | NM |
| 2015-03-13 | 505-589 | 0–9 XXXall 10 · 4 holders which blocks → | METROPCS, INC. | 5562 | ALBUQURQUE | NM |
| 2014-09-19 | 505-545 | 0–9 XXXall 10 · 3 holders which blocks → | METROPCS, INC. | 5562 | ALBUQURQUE | NM |
| 2013-04-04 | 505-373 | 0–9 XXXall 10 · 4 holders which blocks → | METROPCS, INC. | 5562 | ALBUQURQUE | NM |
| 2002-04-19 | 505-795 | 0–9 XXXall 10 · 3 holders which blocks → | METROPCS, INC. | 5562 | SANTA FE | NM |
| 2002-03-20 | 505-692 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → | METROPCS, INC. | 5562 | ESPANOLA | NM |
| 2001-05-14 | 505-307 | 7XXX8XXX · 2 holders which blocks → | METROPCS, INC. | 5562 | ALBUQURQUE | NM |
| — | 505-463 | none assigned yet which blocks → | METROPCS, INC. | 5562 | ALBUQURQUE | NM |
| — | 505-500 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | METROPCS, INC. | 5562 | LOS ALAMOS | NM |
| — | 505-501 | 6XXX7XXX8XXX · 3 holders which blocks → | METROPCS, INC. | 5562 | SANTA FE | NM |
| — | 505-577 | none assigned yet which blocks → | METROPCS, INC. | 5562 | SANTA FE | NM |
| — | 505-604 | none assigned yet which blocks → | METROPCS, INC. | 5562 | ALBUQURQUE | NM |
| — | 505-688 | none assigned yet which blocks → | METROPCS, INC. | 5562 | ALBUQURQUE | NM |
| — | 505-710 | none assigned yet which blocks → | METROPCS, INC. | 5562 | ALBUQURQUE | NM |
| — | 505-780 | 4XXX5XXX8XXX9XXX · 3 holders which blocks → | METROPCS, INC. | 5562 | SANTA FE | NM |
| — | 505-913 | 2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → | METROPCS, INC. | 5562 | SANTA FE | 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.