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 |
|---|---|---|---|---|---|---|---|
| 2010-10-15 | 559-258-6XXX | 6000–6999 | Assigned | AT&T ENTERPRISES, LLC | 516C | DEL REY | CA |
| 2010-10-15 | 559-382-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | MENDOTA | CA |
| 2010-10-15 | 559-427-6XXX | 6000–6999 | Assigned | AT&T ENTERPRISES, LLC | 516C | PIXLEY | CA |
| 2010-10-15 | 559-464-3XXX | 3000–3999 | Assigned | AT&T ENTERPRISES, LLC | 516C | TERRABELLA | CA |
| 2010-10-15 | 559-465-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | THREERIVRS | CA |
| 2010-10-15 | 559-466-6XXX | 6000–6999 | Assigned | AT&T ENTERPRISES, LLC | 516C | TIPTON | CA |
| 2010-10-15 | 559-596-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | DINUBA | CA |
| 2010-10-15 | 559-694-2XXX | 2000–2999 | Assigned | AT&T ENTERPRISES, LLC | 516C | FIREBAUGH | CA |
| 2010-10-15 | 559-763-6XXX | 6000–6999 | Assigned | AT&T ENTERPRISES, LLC | 516C | HURON | CA |
| 2010-10-15 | 559-769-2XXX | 2000–2999 | Assigned | AT&T ENTERPRISES, LLC | 516C | WOODLAKE | CA |
| 2010-10-15 | 559-821-8XXX | 8000–8999 | Assigned | AT&T ENTERPRISES, LLC | 516C | COALINGA | CA |
| 2010-10-15 | 559-823-2XXX | 2000–2999 | Assigned | AT&T ENTERPRISES, LLC | 516C | ORANGECOVE | CA |
| 2010-10-15 | 559-847-2XXX | 2000–2999 | Assigned | AT&T ENTERPRISES, LLC | 516C | PARLIER | CA |
| 2010-10-15 | 559-869-6XXX | 6000–6999 | Assigned | AT&T ENTERPRISES, LLC | 516C | KINGSBURG | CA |
| 2010-10-15 | 559-898-3XXX | 3000–3999 | Assigned | AT&T ENTERPRISES, LLC | 516C | SELMA | CA |
| 2010-10-15 | 559-922-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | LATON | CA |
| 2010-10-15 | 559-997-1XXX | 1000–1999 | Assigned | AT&T ENTERPRISES, LLC | 516C | LEMOORE | CA |
| 2010-10-14 | 559-428-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | RIVERDALE | CA |
| 2010-10-12 | 559-682-2XXX | 2000–2999 | Assigned | T-MOBILE USA, INC. | 6529 | CARUTHERS | CA |
| 2010-10-04 | 559-480-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | REEDLEY | CA |
| 2010-10-01 | 559-423-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | LEMOORE | CA |
| 2010-09-30 | 559-530-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | HANFORD | CA |
| 2010-09-20 | 559-512-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | FRESNO | CA |
| 2010-09-16 | 559-660-5XXX | 5000–5999 | Assigned | COMCAST PHONE OF CALIFORNIA, LLC | 394L | MADERA | CA |
| 2010-09-03 | 559-345-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | LEMOORE | CA |
| 2010-09-03 | 559-372-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | VISALIA | CA |
| 2010-09-03 | 559-460-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | SELMA | CA |
| 2010-09-01 | 559-492-4XXX | 4000–4999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7145 | FRESNO | CA |
| 2010-08-30 | 559-530-3XXX | 3000–3999 | Assigned | COMCAST PHONE OF CALIFORNIA, LLC | 394L | HANFORD | CA |
| 2010-08-25 | 559-238-7XXX | 7000–7999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | KINGSBURG | CA |
| 2010-08-25 | 559-282-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | AVENAL | CA |
| 2010-08-25 | 559-382-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | MENDOTA | CA |
| 2010-08-25 | 559-425-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | ORANGECOVE | CA |
| 2010-08-25 | 559-426-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | PARLIER | CA |
| 2010-08-09 | 559-940-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | CLOVIS | CA |
| 2010-08-06 | 559-940-6XXX | 6000–6999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | CLOVIS | CA |
| 2010-08-04 | 559-515-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | FRESNO | CA |
| 2010-08-03 | 559-342-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | PIXLEY | CA |
| 2010-08-03 | 559-428-3XXX | 3000–3999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | RIVERDALE | CA |
| 2010-08-03 | 559-468-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | WOODLAKE | CA |
| 2010-07-30 | 559-402-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | BURREL | CA |
| 2010-07-30 | 559-403-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | CARUTHERS | CA |
| 2010-07-22 | 559-515-6XXX | 6000–6999 | Assigned | AT&T ENTERPRISES, LLC | 516C | FRESNO | CA |
| 2010-07-15 | 559-466-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | TIPTON | CA |
| 2010-07-13 | 559-481-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | MADERA | CA |
| 2010-07-12 | 559-321-7XXX | 7000–7999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | CLOVIS | CA |
| 2010-07-07 | 559-920-9XXX | 9000–9999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | PORTERVL | CA |
| 2010-06-23 | 559-480-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | REEDLEY | CA |
| 2010-06-22 | 559-496-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | FRESNO | CA |
| 2010-06-11 | 559-524-3XXX | 3000–3999 | Assigned | FRONTIER CALIFORNIA INC. | 4420 | SANGER | 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.