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 |
|---|---|---|---|---|---|---|
| — | 310-463 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SNMN SNMN | CA |
| — | 310-528 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | CMTN GRDN | CA |
| — | 310-529 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | EL SEGUNDO | CA |
| — | 310-567 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | CMTN GRDN | CA |
| — | 310-592 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | W ANGELES | CA |
| — | 310-666 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | BEVERLYHLS | CA |
| — | 310-694 | 0–9 XXXall 10 · 3 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | W ANGELES | CA |
| — | 310-745 | 5XXX6XXX9XXX · 3 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SNMN MRVS | CA |
| — | 310-748 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | CMTN GRDN | CA |
| — | 310-753 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | CMTN GRDN | CA |
| — | 310-801 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | BEVERLYHLS | CA |
| — | 310-804 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SNMN SNMN | CA |
| — | 310-849 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | BEVERLYHLS | CA |
| — | 310-869 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | W ANGELES | CA |
| — | 310-908 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | INGLEWOOD | CA |
| — | 310-918 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | CMTN GRDN | CA |
| — | 310-938 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | TORRANCE | CA |
| — | 310-989 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | CMTN GRDN | CA |
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.