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 |
|---|---|---|---|---|---|---|---|
| 2015-02-18 | 559-943-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | DEL REY | CA |
| 2015-02-17 | 559-545-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | CLOVIS | CA |
| 2015-02-10 | 559-373-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | MADERA | CA |
| 2015-02-10 | 559-556-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | TULARE | CA |
| 2015-02-10 | 559-754-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | VISALIA | CA |
| 2015-02-05 | 559-644-2XXX | 2000–2999 | Assigned | T-MOBILE USA, INC. | 6529 | CARUTHERS | CA |
| 2015-02-05 | 559-644-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | CARUTHERS | CA |
| 2015-02-05 | 559-682-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | CARUTHERS | CA |
| 2015-02-05 | 559-682-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | CARUTHERS | CA |
| 2015-02-05 | 559-754-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | VISALIA | CA |
| 2015-02-03 | 559-545-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | CLOVIS | CA |
| 2015-02-03 | 559-545-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | CLOVIS | CA |
| 2015-02-03 | 559-545-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | CLOVIS | CA |
| 2015-01-20 | 559-306-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | PORTERVL | CA |
| 2015-01-20 | 559-424-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | MENDOTA | CA |
| 2015-01-20 | 559-425-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | ORANGECOVE | CA |
| 2015-01-20 | 559-574-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | PARLIER | CA |
| 2015-01-20 | 559-632-5XXX | 5000–5999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | RIVERDALE | CA |
| 2015-01-20 | 559-668-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | FRESNO | CA |
| 2015-01-19 | 559-282-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | AVENAL | CA |
| 2015-01-19 | 559-295-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | COALINGA | CA |
| 2015-01-19 | 559-407-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | FIREBAUGH | CA |
| 2015-01-16 | 559-898-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SELMA | CA |
| 2015-01-16 | 559-942-1XXX | 1000–1999 | Assigned | T-MOBILE USA, INC. | 6529 | CARUTHERS | CA |
| 2015-01-16 | 559-942-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | CARUTHERS | CA |
| 2015-01-15 | 559-368-3XXX | 3000–3999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | TULARE | CA |
| 2015-01-14 | 559-633-3XXX | 3000–3999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | LEMOORE | CA |
| 2015-01-14 | 559-813-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | FOWLER | CA |
| 2015-01-14 | 559-826-0XXX | 0000–0999 | Assigned | T-MOBILE USA, INC. | 6529 | CLOVIS | CA |
| 2015-01-14 | 559-853-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | PORTERVL | CA |
| 2015-01-13 | 559-670-2XXX | 2000–2999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | HANFORD | CA |
| 2015-01-12 | 559-668-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | FRESNO | CA |
| 2015-01-08 | 559-724-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | FRESNO | CA |
| 2015-01-08 | 559-724-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | FRESNO | CA |
| 2015-01-08 | 559-724-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | FRESNO | CA |
| 2015-01-08 | 559-724-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | FRESNO | CA |
| 2015-01-08 | 559-826-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | CLOVIS | CA |
| 2014-12-30 | 559-724-0XXX | 0000–0999 | Assigned | METROPCS, INC. | 5562 | FRESNO | CA |
| 2014-12-30 | 559-724-1XXX | 1000–1999 | Assigned | METROPCS, INC. | 5562 | FRESNO | CA |
| 2014-12-30 | 559-724-2XXX | 2000–2999 | Assigned | METROPCS, INC. | 5562 | FRESNO | CA |
| 2014-12-29 | 559-223-9XXX | 9000–9999 | Assigned | PEERLESS NETWORK OF CALIFORNIA, LLC - CA | 373F | CHOWCHILLA | CA |
| 2014-12-26 | 559-754-2XXX | 2000–2999 | Assigned | COMCAST PHONE OF CALIFORNIA, LLC | 394L | VISALIA | CA |
| 2014-12-22 | 559-652-0XXX | 0000–0999 | Assigned | METROPCS, INC. | 5562 | FRESNO | CA |
| 2014-12-22 | 559-652-1XXX | 1000–1999 | Assigned | METROPCS, INC. | 5562 | FRESNO | CA |
| 2014-12-22 | 559-652-2XXX | 2000–2999 | Assigned | METROPCS, INC. | 5562 | FRESNO | CA |
| 2014-12-22 | 559-652-3XXX | 3000–3999 | Assigned | METROPCS, INC. | 5562 | FRESNO | CA |
| 2014-12-22 | 559-652-4XXX | 4000–4999 | Assigned | METROPCS, INC. | 5562 | FRESNO | CA |
| 2014-12-22 | 559-652-5XXX | 5000–5999 | Assigned | METROPCS, INC. | 5562 | FRESNO | CA |
| 2014-12-22 | 559-652-6XXX | 6000–6999 | Assigned | METROPCS, INC. | 5562 | FRESNO | CA |
| 2014-12-22 | 559-652-7XXX | 7000–7999 | Assigned | METROPCS, INC. | 5562 | 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.