NumberResearchRecent thousands-block assignments
21 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/21/2026
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
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Jan 2026
Dec 2025
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2015-05-08 | 559-794-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | HANFORD | CA |
| 2015-05-08 | 559-794-3XXX | 3000–3999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | HANFORD | CA |
| 2015-04-29 | 559-538-8XXX | 8000–8999 | Assigned | METROPCS, INC. | 5562 | FRESNO | CA |
| 2015-04-29 | 559-721-1XXX | 1000–1999 | Assigned | METROPCS, INC. | 5562 | FRESNO | CA |
| 2015-04-29 | 559-721-3XXX | 3000–3999 | Assigned | METROPCS, INC. | 5562 | FRESNO | CA |
| 2015-04-28 | 559-545-2XXX | 2000–2999 | Assigned | T-MOBILE USA, INC. | 6529 | CLOVIS | CA |
| 2015-04-28 | 559-545-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | CLOVIS | CA |
| 2015-04-24 | 559-223-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | CHOWCHILLA | CA |
| 2015-04-24 | 559-368-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | TULARE | CA |
| 2015-04-23 | 559-368-2XXX | 2000–2999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | TULARE | CA |
| 2015-04-23 | 559-899-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | FRESNO | CA |
| 2015-04-23 | 559-899-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | FRESNO | CA |
| 2015-04-23 | 559-899-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | FRESNO | CA |
| 2015-04-23 | 559-899-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | FRESNO | CA |
| 2015-04-23 | 559-899-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | FRESNO | CA |
| 2015-04-22 | 559-545-0XXX | 0000–0999 | Assigned | ONVOY, LLC - CA | 649C | CLOVIS | CA |
| 2015-04-21 | 559-831-2XXX | 2000–2999 | Assigned | COMCAST PHONE OF CALIFORNIA, LLC | 394L | MADERA | CA |
| 2015-04-20 | 559-690-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | VISALIA | CA |
| 2015-04-20 | 559-690-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | VISALIA | CA |
| 2015-04-20 | 559-690-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | VISALIA | CA |
| 2015-04-16 | 559-339-1XXX | 1000–1999 | Assigned | T-MOBILE USA, INC. | 6529 | PORTERVL | CA |
| 2015-04-16 | 559-339-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | PORTERVL | CA |
| 2015-04-16 | 559-339-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | PORTERVL | CA |
| 2015-04-16 | 559-544-2XXX | 2000–2999 | Assigned | T-MOBILE USA, INC. | 6529 | PORTERVL | CA |
| 2015-04-13 | 559-541-0XXX | 0000–0999 | Assigned | METROPCS, INC. | 5562 | FRESNO | CA |
| 2015-04-13 | 559-541-1XXX | 1000–1999 | Assigned | METROPCS, INC. | 5562 | FRESNO | CA |
| 2015-04-13 | 559-541-2XXX | 2000–2999 | Assigned | METROPCS, INC. | 5562 | FRESNO | CA |
| 2015-04-13 | 559-541-3XXX | 3000–3999 | Assigned | METROPCS, INC. | 5562 | FRESNO | CA |
| 2015-04-13 | 559-541-4XXX | 4000–4999 | Assigned | METROPCS, INC. | 5562 | FRESNO | CA |
| 2015-04-13 | 559-541-5XXX | 5000–5999 | Assigned | METROPCS, INC. | 5562 | FRESNO | CA |
| 2015-04-13 | 559-541-6XXX | 6000–6999 | Assigned | METROPCS, INC. | 5562 | FRESNO | CA |
| 2015-04-13 | 559-541-7XXX | 7000–7999 | Assigned | METROPCS, INC. | 5562 | FRESNO | CA |
| 2015-04-13 | 559-541-8XXX | 8000–8999 | Assigned | METROPCS, INC. | 5562 | FRESNO | CA |
| 2015-04-13 | 559-541-9XXX | 9000–9999 | Assigned | METROPCS, INC. | 5562 | FRESNO | CA |
| 2015-04-13 | 559-721-0XXX | 0000–0999 | Assigned | ONVOY, LLC - CA | 649C | FRESNO | CA |
| 2015-04-13 | 559-721-2XXX | 2000–2999 | Assigned | COMCAST PHONE OF CALIFORNIA, LLC | 394L | FRESNO | CA |
| 2015-04-09 | 559-545-6XXX | 6000–6999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | CLOVIS | CA |
| 2015-04-09 | 559-563-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | VISALIA | CA |
| 2015-04-09 | 559-563-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | VISALIA | CA |
| 2015-04-09 | 559-563-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | VISALIA | CA |
| 2015-04-09 | 559-563-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | VISALIA | CA |
| 2015-04-09 | 559-563-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | VISALIA | CA |
| 2015-04-09 | 559-598-4XXX | 4000–4999 | Assigned | METROPCS, INC. | 5562 | MADERA | CA |
| 2015-04-09 | 559-598-8XXX | 8000–8999 | Assigned | METROPCS, INC. | 5562 | MADERA | CA |
| 2015-04-09 | 559-690-2XXX | 2000–2999 | Assigned | METROPCS, INC. | 5562 | VISALIA | CA |
| 2015-04-09 | 559-998-6XXX | 6000–6999 | Assigned | METROPCS, INC. | 5562 | LEMOORE | CA |
| 2015-04-09 | 559-998-7XXX | 7000–7999 | Assigned | METROPCS, INC. | 5562 | LEMOORE | CA |
| 2015-04-07 | 559-373-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | MADERA | CA |
| 2015-04-07 | 559-418-5XXX | 5000–5999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | HURON | CA |
| 2015-04-07 | 559-528-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | DINUBA | CA |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/21/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.