NumberResearchRecent thousands-block assignments
21 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/20/2026
Most carrier growth happens here, not at the prefix level: under number pooling, carriers receive individual 1,000-number blocks (e.g. 626-470-0XXX) within already-assigned prefixes. Assignments are initial assignments — the current serving carrier of individual numbers may differ due to portability.
Most active assignees, last 30 days — NPA 559
New assignments by month
Sep 2026
Aug 2026
Jul 2026
Jun 2026
May 2026
Apr 2026
Mar 2026
Feb 2026
Jan 2026
Dec 2025
Nov 2025
Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2015-03-05 | 559-817-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | LEMOORE | CA |
| 2015-03-04 | 559-403-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | CARUTHERS | CA |
| 2015-03-04 | 559-727-0XXX | 0000–0999 | Assigned | METROPCS, INC. | 5562 | FRESNO | CA |
| 2015-03-04 | 559-727-1XXX | 1000–1999 | Assigned | T-MOBILE USA, INC. | 6529 | FRESNO | CA |
| 2015-03-04 | 559-727-2XXX | 2000–2999 | Assigned | T-MOBILE USA, INC. | 6529 | FRESNO | CA |
| 2015-03-04 | 559-727-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | FRESNO | CA |
| 2015-03-04 | 559-727-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | FRESNO | CA |
| 2015-03-04 | 559-727-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | FRESNO | CA |
| 2015-03-04 | 559-727-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | FRESNO | CA |
| 2015-03-04 | 559-727-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | FRESNO | CA |
| 2015-03-04 | 559-727-8XXX | 8000–8999 | Assigned | METROPCS, INC. | 5562 | FRESNO | CA |
| 2015-03-04 | 559-727-9XXX | 9000–9999 | Assigned | METROPCS, INC. | 5562 | FRESNO | CA |
| 2015-03-04 | 559-864-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | CARUTHERS | CA |
| 2015-03-04 | 559-864-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | CARUTHERS | CA |
| 2015-03-04 | 559-864-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | CARUTHERS | CA |
| 2015-03-04 | 559-942-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | CARUTHERS | CA |
| 2015-03-03 | 559-373-1XXX | 1000–1999 | Assigned | T-MOBILE USA, INC. | 6529 | MADERA | CA |
| 2015-03-03 | 559-373-2XXX | 2000–2999 | Assigned | T-MOBILE USA, INC. | 6529 | MADERA | CA |
| 2015-03-03 | 559-373-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | MADERA | CA |
| 2015-03-03 | 559-373-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | MADERA | CA |
| 2015-02-27 | 559-223-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | CHOWCHILLA | CA |
| 2015-02-27 | 559-334-9XXX | 9000–9999 | Assigned | METROPCS, INC. | 5562 | VISALIA | CA |
| 2015-02-27 | 559-574-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PARLIER | CA |
| 2015-02-27 | 559-754-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | VISALIA | CA |
| 2015-02-27 | 559-754-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | VISALIA | CA |
| 2015-02-26 | 559-368-6XXX | 6000–6999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | TULARE | CA |
| 2015-02-25 | 559-373-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | MADERA | CA |
| 2015-02-25 | 559-373-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | MADERA | CA |
| 2015-02-25 | 559-373-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | MADERA | CA |
| 2015-02-24 | 559-391-1XXX | 1000–1999 | Assigned | T-MOBILE USA, INC. | 6529 | REEDLEY | CA |
| 2015-02-24 | 559-391-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | REEDLEY | CA |
| 2015-02-24 | 559-726-0XXX | 0000–0999 | Assigned | T-MOBILE USA, INC. | 6529 | REEDLEY | CA |
| 2015-02-24 | 559-726-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | REEDLEY | CA |
| 2015-02-24 | 559-726-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | REEDLEY | CA |
| 2015-02-19 | 559-668-1XXX | 1000–1999 | Assigned | T-MOBILE USA, INC. | 6529 | FRESNO | CA |
| 2015-02-19 | 559-668-2XXX | 2000–2999 | Assigned | T-MOBILE USA, INC. | 6529 | FRESNO | CA |
| 2015-02-19 | 559-668-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | FRESNO | CA |
| 2015-02-19 | 559-668-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | FRESNO | CA |
| 2015-02-19 | 559-668-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | FRESNO | CA |
| 2015-02-19 | 559-668-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | FRESNO | CA |
| 2015-02-19 | 559-668-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | FRESNO | CA |
| 2015-02-19 | 559-668-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | FRESNO | CA |
| 2015-02-18 | 559-469-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | HANFORD | CA |
| 2015-02-18 | 559-813-1XXX | 1000–1999 | Assigned | T-MOBILE USA, INC. | 6529 | FOWLER | CA |
| 2015-02-18 | 559-813-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | FOWLER | CA |
| 2015-02-18 | 559-813-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | FOWLER | CA |
| 2015-02-18 | 559-852-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | HANFORD | CA |
| 2015-02-18 | 559-852-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | HANFORD | CA |
| 2015-02-18 | 559-943-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | DEL REY | CA |
| 2015-02-18 | 559-943-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | DEL REY | CA |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.