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 |
|---|---|---|---|---|---|---|
| 2015-06-12 | 620-523 | 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | UNITED WIRELESS COMMUNICATIONS, INC. - KS | 642H | DODGE CITY | KS |
| 2012-07-30 | 620-219 | 0XXX5XXX · 2 holders which blocks → | UNITED WIRELESS COMMUNICATIONS, INC. | 401D | CIMARRON | KS |
| 2011-01-20 | 620-600 | 0XXX1XXX5XXX6XXX · 4 holders which blocks → | UNITED WIRELESS COMMUNICATIONS, INC. | 401D | ELKHART | KS |
| 2006-12-21 | 620-283 | 5XXX which blocks → | UNITED WIRELESS COMMUNICATIONS, INC. | 401D | SYRACUSE | KS |
| 2006-12-20 | 620-541 | 1XXX which blocks → | UNITED WIRELESS COMMUNICATIONS, INC. | 401D | HUGOTON | KS |
| 2006-12-19 | 620-351 | 5XXX which blocks → | UNITED WIRELESS COMMUNICATIONS, INC. | 401D | JOHNSON | KS |
| 2006-12-19 | 620-436 | none assigned yet which blocks → | UNITED WIRELESS COMMUNICATIONS, INC. | 401D | LAKIN | KS |
| 2006-12-19 | 620-554 | none assigned yet which blocks → | UNITED WIRELESS COMMUNICATIONS, INC. | 401D | ULYSSES | KS |
| 2006-12-19 | 620-595 | 9XXX which blocks → | UNITED WIRELESS COMMUNICATIONS, INC. | 401D | MOSCOW | KS |
| 2006-12-19 | 620-651 | none assigned yet which blocks → | UNITED WIRELESS COMMUNICATIONS, INC. | 401D | DEERFIELD | KS |
| 2006-12-19 | 620-746 | 5XXX7XXX · 2 holders which blocks → | UNITED WIRELESS COMMUNICATIONS, INC. | 401D | SATANTA | KS |
| 2006-12-19 | 620-835 | none assigned yet which blocks → | UNITED WIRELESS COMMUNICATIONS, INC. | 401D | ROLLA | KS |
| 2006-02-07 | 620-393 | 0XXX1XXX3XXX5XXX9XXX · 5 holders which blocks → | UNITED WIRELESS COMMUNICATIONS, INC. | 401D | JETMORE | KS |
| 2006-01-03 | 620-789 | not yet reported which blocks → | UNITED WIRELESS COMMUNICATIONS, INC. | 401D | DODGE CITY | KS |
| — | 620-561 | 1XXX8XXX9XXX · 2 holders which blocks → | UNITED WIRELESS COMMUNICATIONS, INC. | 401D | DODGE CITY | KS |
| — | 620-861 | not yet reported which blocks → | UNITED WIRELESS COMMUNICATIONS, INC. | 401D | SUBLETTE | KS |
| — | 620-937 | 3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → | UNITED WIRELESS COMMUNICATIONS, INC. | 401D | GARDENCITY | KS |
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.