NumberResearchRecent thousands-block assignments
22 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 |
|---|---|---|---|---|---|---|---|
| 2011-04-07 | 559-344-6XXX | 6000–6999 | Assigned | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | FOWLER | CA |
| 2011-04-06 | 559-572-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | HANFORD | CA |
| 2011-04-06 | 559-667-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | VISALIA | CA |
| 2011-04-06 | 559-667-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | VISALIA | CA |
| 2011-04-06 | 559-667-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | VISALIA | CA |
| 2011-03-30 | 559-429-3XXX | 3000–3999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7145 | VISALIA | CA |
| 2011-03-30 | 559-549-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | FRESNO | CA |
| 2011-03-30 | 559-549-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | FRESNO | CA |
| 2011-03-30 | 559-549-3XXX | 3000–3999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | FRESNO | CA |
| 2011-03-30 | 559-549-4XXX | 4000–4999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | FRESNO | CA |
| 2011-03-30 | 559-549-7XXX | 7000–7999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | FRESNO | CA |
| 2011-03-30 | 559-549-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | FRESNO | CA |
| 2011-03-25 | 559-568-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | LINDSAY | CA |
| 2011-03-24 | 559-406-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | DINUBA | CA |
| 2011-03-23 | 559-663-7XXX | 7000–7999 | Assigned | ONVOY, LLC - CA | 649C | CHOWCHILLA | CA |
| 2011-03-14 | 559-549-5XXX | 5000–5999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | FRESNO | CA |
| 2011-03-08 | 559-797-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | CLOVIS | CA |
| 2011-02-15 | 559-515-3XXX | 3000–3999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | FRESNO | CA |
| 2011-02-07 | 559-800-5XXX | 5000–5999 | Assigned | METROPCS, INC. | 5562 | FRESNO | CA |
| 2011-02-07 | 559-800-6XXX | 6000–6999 | Assigned | METROPCS, INC. | 5562 | FRESNO | CA |
| 2011-01-25 | 559-384-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | BURREL | CA |
| 2011-01-11 | 559-515-1XXX | 1000–1999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | FRESNO | CA |
| 2010-12-23 | 559-493-5XXX | 5000–5999 | Assigned | COMCAST PHONE OF CALIFORNIA, LLC | 394L | FRESNO | CA |
| 2010-12-17 | 559-422-3XXX | 3000–3999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | LATON | CA |
| 2010-12-13 | 559-203-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | CLOVIS | CA |
| 2010-12-08 | 559-515-8XXX | 8000–8999 | Assigned | ONVOY, LLC - CA | 649C | FRESNO | CA |
| 2010-12-01 | 559-515-7XXX | 7000–7999 | Assigned | ONVOY, LLC - CA | 649C | FRESNO | CA |
| 2010-11-22 | 559-719-5XXX | 5000–5999 | Assigned | METROPCS, INC. | 5562 | PORTERVL | CA |
| 2010-11-22 | 559-797-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | CLOVIS | CA |
| 2010-11-20 | 559-530-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | HANFORD | CA |
| 2010-11-19 | 559-512-7XXX | 7000–7999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | FRESNO | CA |
| 2010-11-19 | 559-513-8XXX | 8000–8999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | FRESNO | CA |
| 2010-11-16 | 559-596-6XXX | 6000–6999 | Assigned | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | DINUBA | CA |
| 2010-11-05 | 559-465-8XXX | 8000–8999 | Assigned | ONVOY, LLC - CA | 649C | THREERIVRS | CA |
| 2010-11-05 | 559-529-3XXX | 3000–3999 | Assigned | ONVOY, LLC - CA | 649C | TIPTON | CA |
| 2010-11-03 | 559-336-8XXX | 8000–8999 | Assigned | ONVOY, LLC - CA | 649C | MIRANTPHST | CA |
| 2010-11-03 | 559-383-3XXX | 3000–3999 | Assigned | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | AVENAL | CA |
| 2010-11-03 | 559-475-9XXX | 9000–9999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | FRESNO | CA |
| 2010-11-03 | 559-646-7XXX | 7000–7999 | Assigned | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | PARLIER | CA |
| 2010-11-01 | 559-554-2XXX | 2000–2999 | Assigned | ONVOY, LLC - CA | 649C | FRESNO | CA |
| 2010-10-25 | 559-631-7XXX | 7000–7999 | Assigned | METROPCS, INC. | 5562 | TULARE | CA |
| 2010-10-25 | 559-631-8XXX | 8000–8999 | Assigned | METROPCS, INC. | 5562 | TULARE | CA |
| 2010-10-25 | 559-667-7XXX | 7000–7999 | Assigned | METROPCS, INC. | 5562 | VISALIA | CA |
| 2010-10-25 | 559-667-8XXX | 8000–8999 | Assigned | METROPCS, INC. | 5562 | VISALIA | CA |
| 2010-10-25 | 559-800-0XXX | 0000–0999 | Assigned | METROPCS, INC. | 5562 | FRESNO | CA |
| 2010-10-25 | 559-800-1XXX | 1000–1999 | Assigned | METROPCS, INC. | 5562 | FRESNO | CA |
| 2010-10-25 | 559-800-2XXX | 2000–2999 | Assigned | METROPCS, INC. | 5562 | FRESNO | CA |
| 2010-10-25 | 559-800-3XXX | 3000–3999 | Assigned | METROPCS, INC. | 5562 | FRESNO | CA |
| 2010-10-25 | 559-800-4XXX | 4000–4999 | Assigned | METROPCS, INC. | 5562 | FRESNO | CA |
| 2010-10-18 | 559-326-0XXX | 0000–0999 | Assigned | AT&T ENTERPRISES, LLC | 516C | CLOVIS | 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.