NumberResearchRecent prefix assignments
0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/19/2026
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 |
|---|---|---|---|---|---|---|
| 2021-01-22 | 956-629 | 0–9 XXXall 10 · 3 holders which blocks → | METROPCS, INC. | 5562 | LAREDO | TX |
| 2017-02-06 | 956-405 | 0–9 XXXall 10 · 4 holders which blocks → | METROPCS, INC. | 5562 | WESLACO | TX |
| 2016-01-20 | 956-715 | 0–9 XXXall 10 · 2 holders which blocks → | METROPCS, INC. | 5562 | PHARR | TX |
| 2014-12-19 | 956-416 | 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → | METROPCS, INC. | 5562 | RIGRANDECY | TX |
| 2014-09-24 | 956-510 | 0–9 XXXall 10 · 2 holders which blocks → | METROPCS, INC. | 5562 | PHARR | TX |
| 2014-09-18 | 956-480 | 0–9 XXXall 10 · 2 holders which blocks → | METROPCS, INC. | 5562 | LAREDO | TX |
| 2014-06-27 | 956-652 | 0–9 XXXall 10 · 2 holders which blocks → | METROPCS, INC. | 5562 | LAREDO | TX |
| 2014-06-16 | 956-503 | 0–9 XXXall 10 · 3 holders which blocks → | METROPCS, INC. | 5562 | DONNA | TX |
| 2014-02-20 | 956-442 | 0–9 XXXall 10 · 2 holders which blocks → | METROPCS, INC. | 5562 | BROWNSVL | TX |
| 2013-05-29 | 956-413 | 0–9 XXXall 10 · 3 holders which blocks → | METROPCS, INC. | 5562 | LAREDO | TX |
| 2013-04-27 | 956-258 | 0–9 XXXall 10 · 3 holders which blocks → | METROPCS, INC. | 5562 | PHARR | TX |
| 2010-12-29 | 956-355 | 0–9 XXXall 10 · 3 holders which blocks → | METROPCS, INC. | 5562 | WESLACO | TX |
| 2009-11-16 | 956-317 | 0–9 XXXall 10 · 6 holders which blocks → | METROPCS, INC. | 5562 | RIGRANDECY | TX |
| 2007-05-08 | 956-524 | 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 6 holders which blocks → | METROPCS, INC. | 5562 | PORTISABEL | TX |
| 2007-03-29 | 956-438 | 0–9 XXXall 10 · 2 holders which blocks → | METROPCS, INC. | 5562 | PHARR | TX |
| 2006-06-06 | 956-884 | 0–9 XXXall 10 · 4 holders which blocks → | METROPCS, INC. | 5562 | PHARR | TX |
| 2003-04-08 | 956-222 | none assigned yet which blocks → | METROPCS, INC. | 5562 | MISSION | TX |
| 2003-02-11 | 956-263 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | METROPCS, INC. | 5562 | RIGRANDECY | TX |
| 2002-10-02 | 956-735 | none assigned yet which blocks → | METROPCS, INC. | 5562 | RIGRANDECY | TX |
| 2002-09-25 | 956-459 | none assigned yet which blocks → | METROPCS, INC. | 5562 | BROWNSVL | TX |
| 2002-09-25 | 956-460 | none assigned yet which blocks → | METROPCS, INC. | 5562 | PHARR | TX |
| 2002-09-25 | 956-463 | none assigned yet which blocks → | METROPCS, INC. | 5562 | WESLACO | TX |
| 2002-06-05 | 956-232 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 6 holders which blocks → | METROPCS, INC. | 5562 | RAYMONDVL | TX |
| — | 956-206 | none assigned yet which blocks → | METROPCS, INC. | 5562 | LAREDO | TX |
| — | 956-454 | none assigned yet which blocks → | METROPCS, INC. | 5562 | HARLINGEN | TX |
| — | 956-494 | 0XXX2XXX4XXX · 2 holders which blocks → | METROPCS, INC. | 5562 | HARLINGEN | TX |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.