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 |
|---|---|---|---|---|---|---|
| 2025-09-25 | 423-996 | 0XXX6XXX9XXX · 2 holders which blocks → | POWERTEL ATLANTA LICENSES, INC. | 7473 | CHARLESTON | TN |
| 2024-06-06 | 423-951 | 0–9 XXXwhole prefix which blocks → | POWERTEL ATLANTA LICENSES, INC. | 7473 | CHARLESTON | TN |
| 2023-10-12 | 423-898 | 0–9 XXXall 10 · 2 holders which blocks → | POWERTEL ATLANTA LICENSES, INC. | 7473 | CHARLESTON | TN |
| 2023-08-30 | 423-889 | 0–9 XXXall 10 · 3 holders which blocks → | POWERTEL ATLANTA LICENSES, INC. | 7473 | CLEVELAND | TN |
| 2009-02-27 | 423-464 | 0–9 XXXall 10 · 5 holders which blocks → | POWERTEL ATLANTA LICENSES, INC. | 7473 | CLEVELAND | TN |
| 2008-06-10 | 423-521 | 0–9 XXXall 10 · 3 holders which blocks → | POWERTEL ATLANTA LICENSES, INC. | 7473 | CHATTNOOGA | TN |
| 2007-11-06 | 423-475 | 0–9 XXXall 10 · 4 holders which blocks → | POWERTEL ATLANTA LICENSES, INC. | 7473 | CHATTNOOGA | TN |
| 2001-09-14 | 423-544 | none assigned yet which blocks → | POWERTEL ATLANTA LICENSES, INC. | 7473 | CHATTNOOGA | TN |
| 2001-05-09 | 423-313 | none assigned yet which blocks → | POWERTEL ATLANTA LICENSES, INC. | 7473 | CHATTNOOGA | TN |
| 2001-04-12 | 423-595 | none assigned yet which blocks → | POWERTEL ATLANTA LICENSES, INC. | 7473 | CHATTNOOGA | TN |
| — | 423-227 | not yet reported which blocks → | POWERTEL ATLANTA LICENSES, INC. | 7473 | CHATTNOOGA | TN |
| — | 423-255 | 0–9 XXXall 10 · 3 holders which blocks → | POWERTEL ATLANTA LICENSES, INC. | 7473 | CHATTNOOGA | TN |
| — | 423-314 | not yet reported which blocks → | POWERTEL ATLANTA LICENSES, INC. | 7473 | CHATTNOOGA | TN |
| — | 423-316 | not yet reported which blocks → | POWERTEL ATLANTA LICENSES, INC. | 7473 | CHATTNOOGA | TN |
| — | 423-331 | 4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → | POWERTEL ATLANTA LICENSES, INC. | 7473 | CLEVELAND | TN |
| — | 423-400 | none assigned yet which blocks → | POWERTEL ATLANTA LICENSES, INC. | 7473 | CHATTNOOGA | TN |
| — | 423-432 | none assigned yet which blocks → | POWERTEL ATLANTA LICENSES, INC. | 7473 | CHATTNOOGA | TN |
| — | 423-503 | none assigned yet which blocks → | POWERTEL ATLANTA LICENSES, INC. | 7473 | CHATTNOOGA | TN |
| — | 423-504 | none assigned yet which blocks → | POWERTEL ATLANTA LICENSES, INC. | 7473 | CHATTNOOGA | TN |
| — | 423-505 | none assigned yet which blocks → | POWERTEL ATLANTA LICENSES, INC. | 7473 | CHATTNOOGA | TN |
| — | 423-593 | none assigned yet which blocks → | POWERTEL ATLANTA LICENSES, INC. | 7473 | CHATTNOOGA | TN |
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.