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 |
|---|---|---|---|---|---|---|
| 2001-04-19 | 909-223 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | ONTARIO | CA |
| 2001-04-19 | 909-224 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | ONTARIO | CA |
| 2001-04-19 | 909-225 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | ONTARIO | CA |
| 2001-04-19 | 909-226 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | ONTARIO | CA |
| 2001-04-19 | 909-227 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | ONTARIO | CA |
| 2001-04-19 | 909-228 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | ONTARIO | CA |
| 2001-04-19 | 909-234 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | ONTARIO | CA |
| 2001-04-19 | 909-289 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | S BERNDINO | CA |
| 2001-04-19 | 909-374 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | POMONA | CA |
| 2001-04-19 | 909-560 | 8XXX which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | UPLAND | CA |
| 2001-04-19 | 909-615 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | ONTARIO | CA |
| — | 909-210 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | ONTARIO | CA |
| — | 909-262 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | ONTARIO | CA |
| — | 909-263 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | POMONA | CA |
| — | 909-553 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | S BERNDINO | CA |
| — | 909-556 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | S BERNDINO | CA |
| — | 909-576 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | POMONA | CA |
| — | 909-641 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | FONTANA | CA |
| — | 909-645 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | COLTON | CA |
| — | 909-663 | 0–9 XXXall 10 · 7 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | S BERNDINO | CA |
| — | 909-702 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | ONTARIO | CA |
| — | 909-709 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | S BERNDINO | CA |
| — | 909-754 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | S BERNDINO | CA |
| — | 909-851 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | ONTARIO | CA |
| — | 909-856 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | S BERNDINO | 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.