NumberResearchRecent thousands-block assignments
22 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/19/2026
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 |
|---|---|---|---|---|---|---|---|
| 2006-07-19 | 559-419-9XXX | 9000–9999 | Assigned | COMCAST PHONE OF CALIFORNIA, LLC | 394L | KINGSBURG | CA |
| 2006-07-19 | 559-422-8XXX | 8000–8999 | Assigned | COMCAST PHONE OF CALIFORNIA, LLC | 394L | LATON | CA |
| 2006-07-19 | 559-423-5XXX | 5000–5999 | Assigned | COMCAST PHONE OF CALIFORNIA, LLC | 394L | LEMOORE | CA |
| 2006-07-19 | 559-618-8XXX | 8000–8999 | Assigned | COMCAST PHONE OF CALIFORNIA, LLC | 394L | TIVYVALLEY | CA |
| 2006-07-19 | 559-623-9XXX | 9000–9999 | Assigned | COMCAST PHONE OF CALIFORNIA, LLC | 394L | VISALIA | CA |
| 2006-07-19 | 559-632-7XXX | 7000–7999 | Assigned | COMCAST PHONE OF CALIFORNIA, LLC | 394L | RIVERDALE | CA |
| 2006-07-19 | 559-743-7XXX | 7000–7999 | Assigned | COMCAST PHONE OF CALIFORNIA, LLC | 394L | REEDLEY | CA |
| 2006-07-18 | 559-201-9XXX | 9000–9999 | Assigned | COMCAST PHONE OF CALIFORNIA, LLC | 394L | CHOWCHILLA | CA |
| 2006-07-18 | 559-258-8XXX | 8000–8999 | Assigned | COMCAST PHONE OF CALIFORNIA, LLC | 394L | DEL REY | CA |
| 2006-07-18 | 559-296-5XXX | 5000–5999 | Assigned | COMCAST PHONE OF CALIFORNIA, LLC | 394L | FIREBAUGH | CA |
| 2006-07-18 | 559-315-5XXX | 5000–5999 | Assigned | COMCAST PHONE OF CALIFORNIA, LLC | 394L | DINUBA | CA |
| 2006-07-18 | 559-316-7XXX | 7000–7999 | Assigned | COMCAST PHONE OF CALIFORNIA, LLC | 394L | FOWLER | CA |
| 2006-07-18 | 559-326-7XXX | 7000–7999 | Assigned | COMCAST PHONE OF CALIFORNIA, LLC | 394L | CLOVIS | CA |
| 2006-07-18 | 559-762-7XXX | 7000–7999 | Assigned | COMCAST PHONE OF CALIFORNIA, LLC | 394L | CORCORAN | CA |
| 2006-07-13 | 559-772-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | HANFORD | CA |
| 2006-07-13 | 559-772-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | HANFORD | CA |
| 2006-07-07 | 559-380-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | HANFORD | CA |
| 2006-07-06 | 559-476-5XXX | 5000–5999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | FRESNO | CA |
| 2006-07-05 | 559-639-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | HANFORD | CA |
| 2006-07-05 | 559-639-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | HANFORD | CA |
| 2006-07-05 | 559-639-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | HANFORD | CA |
| 2006-06-29 | 559-397-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | DINUBA | CA |
| 2006-06-29 | 559-572-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | HANFORD | CA |
| 2006-06-29 | 559-840-0XXX | 0000–0999 | Assigned | COMCAST PHONE OF CALIFORNIA, LLC | 394L | FRESNO | CA |
| 2006-06-29 | 559-840-1XXX | 1000–1999 | Assigned | COMCAST PHONE OF CALIFORNIA, LLC | 394L | FRESNO | CA |
| 2006-06-29 | 559-840-2XXX | 2000–2999 | Assigned | COMCAST PHONE OF CALIFORNIA, LLC | 394L | FRESNO | CA |
| 2006-06-22 | 559-366-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | TULARE | CA |
| 2006-05-31 | 559-363-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | MADERA | CA |
| 2006-05-31 | 559-836-6XXX | 6000–6999 | Assigned | METROPCS, INC. | 5562 | HANFORD | CA |
| 2006-05-31 | 559-892-0XXX | 0000–0999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | FRESNO | CA |
| 2006-05-31 | 559-892-1XXX | 1000–1999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | FRESNO | CA |
| 2006-05-25 | 559-253-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | FRESNO | CA |
| 2006-05-25 | 559-265-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | FRESNO | CA |
| 2006-05-25 | 559-331-2XXX | 2000–2999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | TULARE | CA |
| 2006-05-18 | 559-817-7XXX | 7000–7999 | Assigned | METROPCS, INC. | 5562 | LEMOORE | CA |
| 2006-05-17 | 559-892-4XXX | 4000–4999 | Assigned | LEVEL 3 TELECOM OF CALIFORNIA, LP - CA | 7718 | FRESNO | CA |
| 2006-05-09 | 559-802-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | VISALIA | CA |
| 2006-05-08 | 559-476-4XXX | 4000–4999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | FRESNO | CA |
| 2006-04-21 | 559-521-2XXX | 2000–2999 | Assigned | ONVOY, LLC - CA | 649C | DEL REY | CA |
| 2006-04-20 | 559-593-6XXX | 6000–6999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | CLOVIS | CA |
| 2006-04-14 | 559-579-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | FRESNO | CA |
| 2006-04-14 | 559-579-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | FRESNO | CA |
| 2006-04-14 | 559-579-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | FRESNO | CA |
| 2006-04-14 | 559-801-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | FRESNO | CA |
| 2006-04-14 | 559-801-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | FRESNO | CA |
| 2006-04-10 | 559-306-2XXX | 2000–2999 | Assigned | T-MOBILE USA, INC. | 6529 | PORTERVL | CA |
| 2006-04-07 | 559-704-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | FRESNO | CA |
| 2006-04-07 | 559-704-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | FRESNO | CA |
| 2006-04-07 | 559-704-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | FRESNO | CA |
| 2006-04-07 | 559-704-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | FRESNO | CA |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.