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 |
|---|---|---|---|---|---|---|
| — | 620-335 | none assigned yet which blocks → | UNITED TEL. ASSN., INC. | 1841 | INGALLS | KS |
| — | 620-369 | none assigned yet which blocks → | UNITED TEL. ASSN., INC. | 1841 | FORD | KS |
| — | 620-385 | not yet reported which blocks → | UNITED TEL. ASSN., INC. | 1841 | SPEARVILLE | KS |
| — | 620-539 | none assigned yet which blocks → | UNITED TEL. ASSN., INC. | 1841 | ENGLEWOOD | KS |
| — | 620-623 | none assigned yet which blocks → | UNITED TEL. ASSN., INC. | 1841 | HANSTON | KS |
| — | 620-635 | none assigned yet which blocks → | UNITED TEL. ASSN., INC. | 1841 | ASHLAND | KS |
| — | 620-668 | none assigned yet which blocks → | UNITED TEL. ASSN., INC. | 1841 | COPELAND | KS |
| — | 620-846 | none assigned yet which blocks → | UNITED TEL. ASSN., INC. | 1841 | MONTEZUMA | KS |
| — | 620-855 | none assigned yet which blocks → | UNITED TEL. ASSN., INC. | 1841 | CIMARRON | KS |
| — | 620-865 | none assigned yet which blocks → | UNITED TEL. ASSN., INC. | 1841 | ENSIGN | 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.