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 |
|---|---|---|---|---|---|---|
| 2022-10-25 | 936-338 | 0–9 XXXall 10 · 4 holders which blocks → | METROPCS, INC. | 5562 | WILLIS | TX |
| 2018-10-18 | 936-286 | 0–9 XXXall 10 · 5 holders which blocks → | METROPCS, INC. | 5562 | CONROE | TX |
| 2017-06-16 | 936-263 | 0–9 XXXall 10 · 4 holders which blocks → | METROPCS, INC. | 5562 | CONROE | TX |
| 2011-04-04 | 936-899 | 0–9 XXXall 10 · 4 holders which blocks → | METROPCS, INC. | 5562 | LUFKIN | TX |
| 2011-03-21 | 936-221 | 0–9 XXXall 10 · 4 holders which blocks → | METROPCS, INC. | 5562 | NACOGDOCHS | TX |
| 2003-12-30 | 936-223 | 3XXX4XXX · 2 holders which blocks → | METROPCS, INC. | 5562 | LIVINGSTON | TX |
| — | 936-209 | 0–9 XXXall 10 · 4 holders which blocks → | METROPCS, INC. | 5562 | NEWWAVERLY | TX |
| — | 936-371 | 4XXX5XXX6XXX8XXX · 3 holders which blocks → | METROPCS, INC. | 5562 | NACOGDOCHS | TX |
| — | 936-414 | 7XXX8XXX which blocks → | METROPCS, INC. | 5562 | LUFKIN | TX |
| — | 936-419 | 0XXX2XXX4XXX5XXX7XXX8XXX · 3 holders which blocks → | METROPCS, INC. | 5562 | PLANTERSVL | TX |
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.