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 |
|---|---|---|---|---|---|---|
| 2020-12-18 | 308-351 | 0–9 XXXall 10 · 3 holders which blocks → | UNITED STATES CELLULAR - NE | 6263 | GOTHENBURG | NE |
| 2020-04-06 | 308-304 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → | UNITED STATES CELLULAR - NE | 6263 | MINDEN | NE |
| 2005-04-15 | 308-414 | 0–9 XXXall 10 · 4 holders which blocks → | UNITED STATES CELLULAR - NE | 6263 | IMPERIAL | NE |
| 2003-01-30 | 308-528 | 1XXX2XXX · 2 holders which blocks → | UNITED STATES CELLULAR - NE | 6263 | MINDEN | NE |
| 2002-11-18 | 308-571 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | UNITED STATES CELLULAR - NE | 6263 | ST PAUL | NE |
| 2002-11-18 | 308-624 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | UNITED STATES CELLULAR - NE | 6263 | CENTRAL CY | NE |
| 2002-10-15 | 308-708 | 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | UNITED STATES CELLULAR - NE | 6263 | KEARNEY | NE |
| — | 308-280 | 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → | UNITED STATES CELLULAR - NE | 6263 | OGALLALA | NE |
| — | 308-320 | 2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | UNITED STATES CELLULAR - NE | 6263 | LEXINGTON | NE |
| — | 308-350 | 3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | UNITED STATES CELLULAR - NE | 6263 | MCCOOK | NE |
| — | 308-383 | none assigned yet which blocks → | UNITED STATES CELLULAR - NE | 6263 | GRAND IS | NE |
| — | 308-391 | 4XXX5XXX6XXX7XXX which blocks → | UNITED STATES CELLULAR - NE | 6263 | GRAND IS | NE |
| — | 308-539 | none assigned yet which blocks → | UNITED STATES CELLULAR - NE | 6263 | NO PLATTE | NE |
| — | 308-589 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX · 2 holders which blocks → | UNITED STATES CELLULAR - NE | 6263 | GRAND IS | NE |
| — | 308-880 | 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → | UNITED STATES CELLULAR - NE | 6263 | BROKEN BOW | NE |
| — | 308-930 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → | UNITED STATES CELLULAR - NE | 6263 | GRAND IS | NE |
| — | 308-999 | 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | UNITED STATES CELLULAR - NE | 6263 | HOLDREGE | NE |
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.