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 |
|---|---|---|---|---|---|---|
| 2025-01-29 | 940-556 | 0XXX1XXX7XXX9XXX · 2 holders which blocks → | T-MOBILE USA, INC. | 6529 | JACKSBORO | TX |
| 2025-01-15 | 940-379 | 0XXX9XXX · 2 holders which blocks → | T-MOBILE USA, INC. | 6529 | KIRKLAND | TX |
| 2025-01-15 | 940-385 | 5XXX9XXX · 2 holders which blocks → | T-MOBILE USA, INC. | 6529 | LAKE KEMP | TX |
| 2025-01-15 | 940-388 | 0XXX3XXX9XXX · 3 holders which blocks → | T-MOBILE USA, INC. | 6529 | GOODLETT | TX |
| 2025-01-15 | 940-396 | 0XXX8XXX9XXX · 2 holders which blocks → | T-MOBILE USA, INC. | 6529 | TRUSCOTT | TX |
| 2025-01-15 | 940-404 | 0XXX4XXX9XXX · 3 holders which blocks → | T-MOBILE USA, INC. | 6529 | WHCY ODELL | TX |
| 2023-11-07 | 940-364 | 0–9 XXXall 10 · 4 holders which blocks → | T-MOBILE USA, INC. | 6529 | DENTON | TX |
| 2023-10-25 | 940-363 | 0–9 XXXall 10 · 3 holders which blocks → | T-MOBILE USA, INC. | 6529 | LAKEDALLAS | TX |
| 2022-10-20 | 940-493 | 0–9 XXXwhole prefix which blocks → | T-MOBILE USA, INC. | 6529 | DENTON | TX |
| 2022-10-20 | 940-629 | 0–9 XXXwhole prefix which blocks → | T-MOBILE USA, INC. | 6529 | DENTON | TX |
| 2022-10-03 | 940-344 | 0–9 XXXall 10 · 3 holders which blocks → | T-MOBILE USA, INC. | 6529 | LAKEDALLAS | TX |
| 2011-07-05 | 940-333 | 0–9 XXXall 10 · 6 holders which blocks → | T-MOBILE USA, INC. | 6529 | CHILDRESS | TX |
| 2010-06-17 | 940-273 | 0–9 XXXall 10 · 5 holders which blocks → | T-MOBILE USA, INC. | 6529 | DECATUR | TX |
| 2005-06-23 | 940-473 | 0XXX2XXX3XXX4XXX5XXX6XXX7XXX · 4 holders which blocks → | T-MOBILE USA, INC. | 6529 | VERNON | TX |
| 2004-02-24 | 940-882 | 0–9 XXXwhole prefix which blocks → | T-MOBILE USA, INC. | 6529 | WICHITAFLS | TX |
| 2001-10-25 | 940-923 | 0XXX2XXX which blocks → | T-MOBILE USA, INC. | 6529 | WICHITAFLS | TX |
| 2001-07-20 | 940-337 | 5XXX7XXX8XXX which blocks → | T-MOBILE USA, INC. | 6529 | WICHITAFLS | TX |
| — | 940-224 | none assigned yet which blocks → | T-MOBILE USA, INC. | 6529 | WICHITAFLS | TX |
| — | 940-594 | not yet reported which blocks → | T-MOBILE USA, INC. | 6529 | DENTON | TX |
| — | 940-595 | 8XXX which blocks → | T-MOBILE USA, INC. | 6529 | DENTON | TX |
| — | 940-597 | 0XXX2XXX which blocks → | T-MOBILE USA, INC. | 6529 | DENTON | TX |
| — | 940-642 | none assigned yet which blocks → | T-MOBILE USA, INC. | 6529 | WICHITAFLS | TX |
| — | 940-859 | 0XXX2XXX7XXX · 3 holders which blocks → | T-MOBILE USA, INC. | 6529 | MINERLWLLS | 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.