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 |
|---|---|---|---|---|---|---|
| 2022-07-28 | 262-270 | 0–9 XXXall 10 · 3 holders which blocks → | UNITED STATES CELLULAR - WI | 6274 | RACINE | WI |
| 2016-03-15 | 262-307 | 0–9 XXXall 10 · 3 holders which blocks → | UNITED STATES CELLULAR - WI | 6274 | MILWAUKZN2 | WI |
| 2015-07-07 | 262-239 | 0–9 XXXall 10 · 3 holders which blocks → | UNITED STATES CELLULAR - WI | 6274 | HUBERTUS | WI |
| 2015-05-20 | 262-233 | 0–9 XXXall 10 · 5 holders which blocks → | UNITED STATES CELLULAR - WI | 6274 | DELAVAN | WI |
| 2014-12-12 | 262-975 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 6 holders which blocks → | UNITED STATES CELLULAR - WI | 6274 | NO PRAIRIE | WI |
| 2007-07-30 | 262-379 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | UNITED STATES CELLULAR - WI | 6274 | ELKHORN | WI |
| 2002-07-22 | 262-607 | 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | UNITED STATES CELLULAR - WI | 6274 | WILLIAMSBY | WI |
| 2001-03-16 | 262-515 | 9XXX which blocks → | UNITED STATES CELLULAR - WI | 6274 | PARKSIDE | WI |
| — | 262-210 | none assigned yet which blocks → | UNITED STATES CELLULAR - WI | 6274 | BURLINGTON | WI |
| — | 262-224 | none assigned yet which blocks → | UNITED STATES CELLULAR - WI | 6274 | HARTFORD | WI |
| — | 262-305 | 8XXX9XXX which blocks → | UNITED STATES CELLULAR - WI | 6274 | JACKSON | WI |
| — | 262-370 | none assigned yet which blocks → | UNITED STATES CELLULAR - WI | 6274 | HARTLAND | WI |
| — | 262-424 | none assigned yet which blocks → | UNITED STATES CELLULAR - WI | 6274 | MILWAUKZN2 | WI |
| — | 262-470 | 9XXX which blocks → | UNITED STATES CELLULAR - WI | 6274 | NO PRAIRIE | WI |
| — | 262-483 | none assigned yet which blocks → | UNITED STATES CELLULAR - WI | 6274 | NEWBURG | WI |
| — | 262-689 | none assigned yet which blocks → | UNITED STATES CELLULAR - WI | 6274 | NEWBURG | WI |
| — | 262-719 | none assigned yet which blocks → | UNITED STATES CELLULAR - WI | 6274 | HARTLAND | WI |
| — | 262-729 | 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | UNITED STATES CELLULAR - WI | 6274 | LAKEGENEVA | WI |
| — | 262-818 | none assigned yet which blocks → | UNITED STATES CELLULAR - WI | 6274 | PARKSIDE | WI |
| — | 262-822 | 2XXX3XXX4XXX · 3 holders which blocks → | UNITED STATES CELLULAR - WI | 6274 | RACINE | WI |
| — | 262-894 | none assigned yet which blocks → | UNITED STATES CELLULAR - WI | 6274 | MILWAUKZN2 | WI |
| — | 262-903 | none assigned yet which blocks → | UNITED STATES CELLULAR - WI | 6274 | LAKEGENEVA | WI |
| — | 262-930 | none assigned yet which blocks → | UNITED STATES CELLULAR - WI | 6274 | CALEDONIA | WI |
| — | 262-939 | none assigned yet which blocks → | UNITED STATES CELLULAR - WI | 6274 | CALEDONIA | WI |
| — | 262-945 | none assigned yet which blocks → | UNITED STATES CELLULAR - WI | 6274 | PARKSIDE | WI |
| — | 262-949 | none assigned yet which blocks → | UNITED STATES CELLULAR - WI | 6274 | LAKEGENEVA | WI |
| — | 262-989 | none assigned yet which blocks → | UNITED STATES CELLULAR - WI | 6274 | CALEDONIA | WI |
| — | 262-993 | none assigned yet which blocks → | UNITED STATES CELLULAR - WI | 6274 | MILWAUKZN2 | WI |
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.