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 |
|---|---|---|---|---|---|---|
| 2021-06-15 | 806-751 | 0XXX1XXX2XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | T-MOBILE USA, INC. | 6529 | DUMAS | TX |
| 2021-06-15 | 806-760 | 0XXX1XXX2XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | T-MOBILE USA, INC. | 6529 | BROWNFIELD | TX |
| 2012-02-22 | 806-218 | 6XXX7XXX8XXX9XXX · 2 holders which blocks → | T-MOBILE USA, INC. | 6529 | LUBBOCK | TX |
| 2010-08-06 | 806-400 | 7XXX9XXX which blocks → | T-MOBILE USA, INC. | 6529 | AMARILLO | TX |
| 2010-06-17 | 806-471 | 0–9 XXXwhole prefix which blocks → | T-MOBILE USA, INC. | 6529 | AMARILLO | TX |
| 2008-03-18 | 806-444 | 0XXX which blocks → | T-MOBILE USA, INC. | 6529 | AMARILLO | TX |
| 2008-03-18 | 806-466 | none assigned yet which blocks → | T-MOBILE USA, INC. | 6529 | LUBBOCK | TX |
| 2004-12-15 | 806-939 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | T-MOBILE USA, INC. | 6529 | LUBBOCK | TX |
| 2004-11-19 | 806-717 | 0–9 XXXall 10 · 4 holders which blocks → | T-MOBILE USA, INC. | 6529 | DUMAS | TX |
| 2004-06-17 | 806-332 | 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → | T-MOBILE USA, INC. | 6529 | LAMESA | TX |
| 2003-11-03 | 806-544 | 0–9 XXXwhole prefix which blocks → | T-MOBILE USA, INC. | 6529 | LUBBOCK | TX |
| 2003-05-15 | 806-206 | none assigned yet which blocks → | T-MOBILE USA, INC. | 6529 | AMARILLO | TX |
| 2002-08-22 | 806-440 | 0XXX7XXX8XXX9XXX · 3 holders which blocks → | T-MOBILE USA, INC. | 6529 | PAMPA | TX |
| 2001-10-12 | 806-928 | 3XXX which blocks → | T-MOBILE USA, INC. | 6529 | LUBBOCK | TX |
| 2001-02-12 | 806-517 | 2XXX4XXX5XXX8XXX9XXX · 2 holders which blocks → | T-MOBILE USA, INC. | 6529 | AMARILLO | TX |
| 2001-02-12 | 806-548 | 5XXX8XXX9XXX · 2 holders which blocks → | T-MOBILE USA, INC. | 6529 | LUBBOCK | TX |
| — | 806-224 | 0–9 XXXall 10 · 4 holders which blocks → | T-MOBILE USA, INC. | 6529 | LUBBOCK | TX |
| — | 806-438 | none assigned yet which blocks → | T-MOBILE USA, INC. | 6529 | LUBBOCK | TX |
| — | 806-451 | 0–9 XXXall 10 · 3 holders which blocks → | T-MOBILE USA, INC. | 6529 | LUBBOCK | TX |
| — | 806-535 | none assigned yet which blocks → | T-MOBILE USA, INC. | 6529 | LUBBOCK | TX |
| — | 806-584 | none assigned yet which blocks → | T-MOBILE USA, INC. | 6529 | AMARILLO | TX |
| — | 806-729 | 2XXX3XXX4XXX which blocks → | T-MOBILE USA, INC. | 6529 | PLAINVIEW | 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.