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 |
|---|---|---|---|---|---|---|
| — | 562-201 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | WHITTIER | CA |
| — | 562-243 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | LONG BEACH | CA |
| — | 562-260 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | CMTN GRDN | CA |
| — | 562-301 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | CMTN GRDN | CA |
| — | 562-322 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | WHITTIER | CA |
| — | 562-397 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | CMTN GRDN | CA |
| — | 562-412 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | NORWALK | CA |
| — | 562-413 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | DOWNEY | CA |
| — | 562-458 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | LA HABRA | CA |
| — | 562-537 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | LONG BEACH | CA |
| — | 562-640 | 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | LA HABRA | CA |
| — | 562-673 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | LONG BEACH | CA |
| — | 562-685 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | LONG BEACH | CA |
| — | 562-715 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | CMTN GRDN | CA |
| — | 562-716 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | NORWALK | CA |
| — | 562-753 | 1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | LONG BEACH | CA |
| — | 562-761 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | CMTN GRDN | CA |
| — | 562-773 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | CMTN GRDN | CA |
| — | 562-818 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | CMTN GRDN | CA |
| — | 562-821 | 0–9 XXXall 10 · 5 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PICORIVERA | CA |
| — | 562-857 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | CMTN GRDN | CA |
| — | 562-858 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | CMTN GRDN | CA |
| — | 562-881 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | LONG BEACH | CA |
| — | 562-882 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | CMTN GRDN | CA |
| — | 562-883 | none assigned yet which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | CMTN GRDN | CA |
| — | 562-895 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | CMTN GRDN | CA |
| — | 562-897 | none assigned yet which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | CMTN GRDN | CA |
| — | 562-899 | none assigned yet 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.