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 |
|---|---|---|---|---|---|---|
| — | 435-326 | not yet reported which blocks → | SOUTH CENTRAL UTAH TEL. ASSN., INC. | 2286 | MARYSVALE | UT |
| — | 435-335 | not yet reported which blocks → | SOUTH CENTRAL UTAH TEL. ASSN., INC. | 2286 | BOULDER | UT |
| — | 435-386 | not yet reported which blocks → | SOUTH CENTRAL UTAH TEL. ASSN., INC. | 2286 | MINERSVL | UT |
| — | 435-387 | not yet reported which blocks → | SOUTH CENTRAL UTAH TEL. ASSN., INC. | 2286 | MILFORD | UT |
| — | 435-425 | not yet reported which blocks → | SOUTH CENTRAL UTAH TEL. ASSN., INC. | 2286 | BICKNELL | UT |
| — | 435-439 | not yet reported which blocks → | SOUTH CENTRAL UTAH TEL. ASSN., INC. | 2286 | BERYL | UT |
| — | 435-463 | not yet reported which blocks → | SOUTH CENTRAL UTAH TEL. ASSN., INC. | 2286 | CEDAR CITY | UT |
| — | 435-467 | not yet reported which blocks → | SOUTH CENTRAL UTAH TEL. ASSN., INC. | 2286 | ST GEORGE | UT |
| — | 435-577 | not yet reported which blocks → | SOUTH CENTRAL UTAH TEL. ASSN., INC. | 2286 | CIRCLEVL | UT |
| — | 435-616 | not yet reported which blocks → | SOUTH CENTRAL UTAH TEL. ASSN., INC. | 2286 | PANGUITCH | UT |
| — | 435-624 | not yet reported which blocks → | SOUTH CENTRAL UTAH TEL. ASSN., INC. | 2286 | ANTIMONY | UT |
| — | 435-638 | not yet reported which blocks → | SOUTH CENTRAL UTAH TEL. ASSN., INC. | 2286 | KOOSHAREM | UT |
| — | 435-644 | not yet reported which blocks → | SOUTH CENTRAL UTAH TEL. ASSN., INC. | 2286 | KANAB | UT |
| — | 435-648 | not yet reported which blocks → | SOUTH CENTRAL UTAH TEL. ASSN., INC. | 2286 | ORDERVILLE | UT |
| — | 435-676 | none assigned yet which blocks → | SOUTH CENTRAL UTAH TEL. ASSN., INC. | 2286 | PANGUITCH | UT |
| — | 435-679 | not yet reported which blocks → | SOUTH CENTRAL UTAH TEL. ASSN., INC. | 2286 | CANNONVL | UT |
| — | 435-682 | not yet reported which blocks → | SOUTH CENTRAL UTAH TEL. ASSN., INC. | 2286 | DUCK CREEK | UT |
| — | 435-735 | not yet reported which blocks → | SOUTH CENTRAL UTAH TEL. ASSN., INC. | 2286 | HATCH | UT |
| — | 435-826 | not yet reported which blocks → | SOUTH CENTRAL UTAH TEL. ASSN., INC. | 2286 | ESCALANTE | UT |
| — | 435-834 | not yet reported which blocks → | SOUTH CENTRAL UTAH TEL. ASSN., INC. | 2286 | BRYCECNYON | UT |
| — | 435-836 | not yet reported which blocks → | SOUTH CENTRAL UTAH TEL. ASSN., INC. | 2286 | LOA | UT |
| — | 435-874 | 4XXX which blocks → | SOUTH CENTRAL UTAH TEL. ASSN., INC. | 2286 | HILDALE | UT |
| — | 435-877 | not yet reported which blocks → | SOUTH CENTRAL UTAH TEL. ASSN., INC. | 2286 | APPLE VLLY | UT |
| — | 435-878 | not yet reported which blocks → | SOUTH CENTRAL UTAH TEL. ASSN., INC. | 2286 | ENTERPRISE | UT |
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.