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 |
|---|---|---|---|---|---|---|---|
| 2008-07-11 | 559-353-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | FRESNO | CA |
| 2008-07-11 | 559-801-1XXX | 1000–1999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | FRESNO | CA |
| 2008-07-10 | 559-326-6XXX | 6000–6999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | CLOVIS | CA |
| 2008-07-08 | 559-408-5XXX | 5000–5999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | FRESNO | CA |
| 2008-07-03 | 559-759-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | TULARE | CA |
| 2008-06-24 | 559-321-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | CLOVIS | CA |
| 2008-06-24 | 559-321-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | CLOVIS | CA |
| 2008-06-24 | 559-321-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | CLOVIS | CA |
| 2008-06-17 | 559-479-8XXX | 8000–8999 | Assigned | COMCAST PHONE OF CALIFORNIA, LLC | 394L | MADERA | CA |
| 2008-05-29 | 559-595-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | DINUBA | CA |
| 2008-05-23 | 559-321-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | CLOVIS | CA |
| 2008-05-23 | 559-429-0XXX | 0000–0999 | Assigned | T-MOBILE USA, INC. | 6529 | VISALIA | CA |
| 2008-05-20 | 559-479-9XXX | 9000–9999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | MADERA | CA |
| 2008-05-13 | 559-372-3XXX | 3000–3999 | Assigned | ONVOY, LLC - CA | 649C | VISALIA | CA |
| 2008-05-13 | 559-372-4XXX | 4000–4999 | Assigned | ONVOY, LLC - CA | 649C | VISALIA | CA |
| 2008-05-13 | 559-416-8XXX | 8000–8999 | Assigned | ONVOY, LLC - CA | 649C | MADERA | CA |
| 2008-05-13 | 559-479-5XXX | 5000–5999 | Assigned | ONVOY, LLC - CA | 649C | MADERA | CA |
| 2008-05-13 | 559-765-2XXX | 2000–2999 | Assigned | ONVOY, LLC - CA | 649C | CLOVIS | CA |
| 2008-05-13 | 559-797-8XXX | 8000–8999 | Assigned | ONVOY, LLC - CA | 649C | CLOVIS | CA |
| 2008-05-13 | 559-853-1XXX | 1000–1999 | Assigned | ONVOY, LLC - CA | 649C | PORTERVL | CA |
| 2008-05-07 | 559-478-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | FRESNO | CA |
| 2008-05-07 | 559-478-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | FRESNO | CA |
| 2008-05-06 | 559-422-5XXX | 5000–5999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | LATON | CA |
| 2008-05-05 | 559-840-6XXX | 6000–6999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | FRESNO | CA |
| 2008-05-05 | 559-840-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | FRESNO | CA |
| 2008-04-30 | 559-862-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | CLOVIS | CA |
| 2008-04-30 | 559-862-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | CLOVIS | CA |
| 2008-04-28 | 559-201-6XXX | 6000–6999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | CHOWCHILLA | CA |
| 2008-04-17 | 559-772-8XXX | 8000–8999 | Assigned | COMCAST PHONE OF CALIFORNIA, LLC | 394L | HANFORD | CA |
| 2008-04-16 | 559-249-6XXX | 6000–6999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | ORANGECOVE | CA |
| 2008-04-16 | 559-419-5XXX | 5000–5999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | KINGSBURG | CA |
| 2008-04-15 | 559-478-4XXX | 4000–4999 | Assigned | COMCAST PHONE OF CALIFORNIA, LLC | 394L | FRESNO | CA |
| 2008-04-15 | 559-478-5XXX | 5000–5999 | Assigned | COMCAST PHONE OF CALIFORNIA, LLC | 394L | FRESNO | CA |
| 2008-04-07 | 559-697-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | VISALIA | CA |
| 2008-04-07 | 559-697-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | VISALIA | CA |
| 2008-04-04 | 559-589-7XXX | 7000–7999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | HANFORD | CA |
| 2008-04-04 | 559-595-5XXX | 5000–5999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | DINUBA | CA |
| 2008-04-04 | 559-657-8XXX | 8000–8999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | FIREBAUGH | CA |
| 2008-04-04 | 559-789-8XXX | 8000–8999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | PORTERVL | CA |
| 2008-04-04 | 559-869-2XXX | 2000–2999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | KINGSBURG | CA |
| 2008-04-04 | 559-898-4XXX | 4000–4999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | SELMA | CA |
| 2008-04-04 | 559-925-4XXX | 4000–4999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | LEMOORE | CA |
| 2008-04-02 | 559-210-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SANJOAQUIN | CA |
| 2008-04-02 | 559-210-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SANJOAQUIN | CA |
| 2008-04-02 | 559-416-5XXX | 5000–5999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7145 | MADERA | CA |
| 2008-04-02 | 559-862-2XXX | 2000–2999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7145 | CLOVIS | CA |
| 2008-03-31 | 559-738-6XXX | 6000–6999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | VISALIA | CA |
| 2008-03-18 | 559-765-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | CLOVIS | CA |
| 2008-03-18 | 559-765-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | CLOVIS | CA |
| 2008-03-14 | 559-817-5XXX | 5000–5999 | Assigned | COMCAST PHONE OF CALIFORNIA, LLC | 394L | LEMOORE | 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.