NumberResearchRecent prefix assignments
0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/19/2026
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 |
|---|---|---|---|---|---|---|
| 2001-05-03 | 951-258 | 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | CORONA | CA |
| 2001-04-30 | 951-333 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | RIVERSIDE | CA |
| 2001-04-30 | 951-961 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | RIVERSIDE | CA |
| 2001-04-23 | 951-768 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | CORONA | CA |
| 2001-04-19 | 951-236 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | RIVERSIDE | CA |
| 2001-04-19 | 951-288 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | RIVERSIDE | CA |
| 2001-04-19 | 951-312 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | RIVERSIDE | CA |
| 2001-04-19 | 951-313 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | RIVERSIDE | CA |
| 2001-04-19 | 951-314 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | CORONA | CA |
| 2001-04-19 | 951-315 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | RIVERSIDE | CA |
| 2001-04-19 | 951-316 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | CORONA | CA |
| 2001-04-19 | 951-317 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | CORONA | CA |
| 2001-04-19 | 951-318 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | RIVERSIDE | CA |
| 2001-04-19 | 951-323 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | RIVERSIDE | CA |
| 2001-04-19 | 951-452 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | RIVERSIDE | CA |
| 2001-02-22 | 951-818 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | CORONA | CA |
| — | 951-237 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | RIVERSIDE | CA |
| — | 951-264 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | CORONA | CA |
| — | 951-265 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | TEMECULA | CA |
| — | 951-294 | 0–9 XXXall 10 · 5 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | TEMECULA | CA |
| — | 951-522 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | RIVERSIDE | CA |
| — | 951-599 | 0–9 XXXall 10 · 6 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | HEMT HMLD | CA |
| — | 951-640 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | RIVERSIDE | CA |
| — | 951-660 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | RIVERSIDE | CA |
| — | 951-743 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | RIVERSIDE | CA |
| — | 951-764 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | TEMECULA | CA |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.