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 |
|---|---|---|---|---|---|---|---|
| 2015-07-10 | 559-540-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | FRESNO | CA |
| 2015-07-10 | 559-540-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | FRESNO | CA |
| 2015-07-10 | 559-540-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | FRESNO | CA |
| 2015-07-10 | 559-567-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | KERMAN | CA |
| 2015-07-10 | 559-586-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | LINDSAY | CA |
| 2015-07-10 | 559-796-2XXX | 2000–2999 | Assigned | T-MOBILE USA, INC. | 6529 | HANFORD | CA |
| 2015-07-10 | 559-796-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | HANFORD | CA |
| 2015-07-10 | 559-832-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | FRESNO | CA |
| 2015-07-10 | 559-832-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | FRESNO | CA |
| 2015-07-10 | 559-832-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | FRESNO | CA |
| 2015-07-10 | 559-832-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | FRESNO | CA |
| 2015-07-10 | 559-854-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PORTERVL | CA |
| 2015-07-09 | 559-377-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | MADERA | CA |
| 2015-07-09 | 559-775-3XXX | 3000–3999 | Assigned | COMCAST PHONE OF CALIFORNIA, LLC | 394L | CHOWCHILLA | CA |
| 2015-07-08 | 559-540-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | FRESNO | CA |
| 2015-07-07 | 559-748-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | EXETER | CA |
| 2015-07-07 | 559-748-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | EXETER | CA |
| 2015-07-06 | 559-330-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | MADERA | CA |
| 2015-07-06 | 559-330-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | MADERA | CA |
| 2015-07-06 | 559-717-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | AVENAL | CA |
| 2015-07-06 | 559-961-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | COALINGA | CA |
| 2015-07-06 | 559-992-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | CORCORAN | CA |
| 2015-06-30 | 559-405-0XXX | 0000–0999 | Assigned | T-MOBILE USA, INC. | 6529 | DEL REY | CA |
| 2015-06-30 | 559-405-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | DEL REY | CA |
| 2015-06-30 | 559-405-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | DEL REY | CA |
| 2015-06-30 | 559-405-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | DEL REY | CA |
| 2015-06-30 | 559-578-3XXX | 3000–3999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | CLOVIS | CA |
| 2015-06-30 | 559-578-4XXX | 4000–4999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | CLOVIS | CA |
| 2015-06-30 | 559-672-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | REEDLEY | CA |
| 2015-06-30 | 559-672-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | REEDLEY | CA |
| 2015-06-30 | 559-672-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | REEDLEY | CA |
| 2015-06-30 | 559-672-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | REEDLEY | CA |
| 2015-06-29 | 559-540-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | FRESNO | CA |
| 2015-06-29 | 559-780-5XXX | 5000–5999 | Assigned | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | CORCORAN | CA |
| 2015-06-22 | 559-571-9XXX | 9000–9999 | Assigned | METROPCS, INC. | 5562 | VISALIA | CA |
| 2015-06-19 | 559-885-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | CARUTHERS | CA |
| 2015-06-19 | 559-885-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | CARUTHERS | CA |
| 2015-06-19 | 559-885-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | CARUTHERS | CA |
| 2015-06-19 | 559-885-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | CARUTHERS | CA |
| 2015-06-19 | 559-885-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | CARUTHERS | CA |
| 2015-06-19 | 559-885-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | CARUTHERS | CA |
| 2015-06-17 | 559-316-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | FOWLER | CA |
| 2015-06-17 | 559-344-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | FOWLER | CA |
| 2015-06-17 | 559-854-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | PORTERVL | CA |
| 2015-06-17 | 559-854-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | PORTERVL | CA |
| 2015-06-17 | 559-942-2XXX | 2000–2999 | Assigned | T-MOBILE USA, INC. | 6529 | CARUTHERS | CA |
| 2015-06-05 | 559-672-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | REEDLEY | CA |
| 2015-06-05 | 559-835-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | FRESNO | CA |
| 2015-06-05 | 559-835-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | FRESNO | CA |
| 2015-06-05 | 559-835-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | FRESNO | 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.