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 |
|---|---|---|---|---|---|---|
| 2025-01-27 | 830-432 | 0XXX1XXX2XXX7XXX9XXX · 3 holders which blocks → | T-MOBILE USA, INC. | 6529 | FLORESVL | TX |
| 2022-09-28 | 830-297 | 0XXX1XXX5XXX6XXX7XXX9XXX · 3 holders which blocks → | T-MOBILE USA, INC. | 6529 | CARRIZOSPG | TX |
| 2022-09-28 | 830-369 | 0–9 XXXall 10 · 4 holders which blocks → | T-MOBILE USA, INC. | 6529 | NEWBRANFLS | TX |
| 2022-08-12 | 830-289 | 0–9 XXXall 10 · 3 holders which blocks → | T-MOBILE USA, INC. | 6529 | UVALDE | TX |
| 2022-02-08 | 830-366 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 5 holders which blocks → | T-MOBILE USA, INC. | 6529 | PLEASANTON | TX |
| 2021-12-20 | 830-359 | 0–9 XXXall 10 · 4 holders which blocks → | T-MOBILE USA, INC. | 6529 | NEWBRANFLS | TX |
| 2021-09-03 | 830-347 | 0–9 XXXall 10 · 6 holders which blocks → | T-MOBILE USA, INC. | 6529 | MARBLE FLS | TX |
| 2019-05-28 | 830-396 | 0–9 XXXall 10 · 3 holders which blocks → | T-MOBILE USA, INC. | 6529 | KENEDY | TX |
| 2017-10-13 | 830-262 | 0–9 XXXall 10 · 8 holders which blocks → | T-MOBILE USA, INC. | 6529 | MARBLE FLS | TX |
| 2015-07-21 | 830-410 | 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | T-MOBILE USA, INC. | 6529 | HONDO | TX |
| 2010-06-17 | 830-383 | 0–9 XXXall 10 · 6 holders which blocks → | T-MOBILE USA, INC. | 6529 | FREDECKSBG | TX |
| 2010-06-16 | 830-353 | 0–9 XXXall 10 · 4 holders which blocks → | T-MOBILE USA, INC. | 6529 | KERRVILLE | TX |
| 2007-07-13 | 830-890 | 0–9 XXXall 10 · 4 holders which blocks → | T-MOBILE USA, INC. | 6529 | KERRVILLE | TX |
| 2003-01-20 | 830-200 | 0XXX2XXX3XXX5XXX · 3 holders which blocks → | T-MOBILE USA, INC. | 6529 | PLEASANTON | TX |
| 2002-10-30 | 830-322 | 0XXX2XXX3XXX5XXX7XXX8XXX · 4 holders which blocks → | T-MOBILE USA, INC. | 6529 | CARRIZOSPG | TX |
| 2002-10-02 | 830-444 | 0XXX2XXX3XXX4XXX5XXX7XXX · 6 holders which blocks → | T-MOBILE USA, INC. | 6529 | HONDO | TX |
| 2002-10-02 | 830-445 | 0XXX2XXX3XXX4XXX7XXX8XXX · 4 holders which blocks → | T-MOBILE USA, INC. | 6529 | GONZALES | TX |
| 2002-07-24 | 830-556 | none assigned yet which blocks → | T-MOBILE USA, INC. | 6529 | SEGUIN | TX |
| 2002-02-05 | 830-688 | 3XXX4XXX5XXX7XXX8XXX · 3 holders which blocks → | T-MOBILE USA, INC. | 6529 | BANDERA | TX |
| 2002-01-07 | 830-477 | 0XXX2XXX3XXX4XXX6XXX7XXX8XXX · 4 holders which blocks → | T-MOBILE USA, INC. | 6529 | GILLETT | TX |
| 2001-02-20 | 830-385 | 0XXX7XXX8XXX · 3 holders which blocks → | T-MOBILE USA, INC. | 6529 | MARBLE FLS | TX |
| — | 830-377 | none assigned yet which blocks → | T-MOBILE USA, INC. | 6529 | KERRVILLE | TX |
| — | 830-534 | none assigned yet which blocks → | T-MOBILE USA, INC. | 6529 | GILLETT | TX |
| — | 830-743 | 4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → | T-MOBILE USA, INC. | 6529 | NEWBRANFLS | TX |
| — | 830-822 | not yet reported which blocks → | T-MOBILE USA, INC. | 6529 | NEWBRANFLS | TX |
| — | 830-900 | 0–9 XXXall 10 · 5 holders which blocks → | T-MOBILE USA, INC. | 6529 | UVALDE | TX |
| — | 830-929 | 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | T-MOBILE USA, INC. | 6529 | BOERNE | 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.