NumberResearchRecent thousands-block assignments
24 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 530
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 |
|---|---|---|---|---|---|---|---|
| 2015-06-05 | 530-715-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | CHICO | CA |
| 2015-06-02 | 530-552-3XXX | 3000–3999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7145 | OROVILLE | CA |
| 2015-06-02 | 530-552-4XXX | 4000–4999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7145 | OROVILLE | CA |
| 2015-06-02 | 530-552-5XXX | 5000–5999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7145 | OROVILLE | CA |
| 2015-06-02 | 530-552-6XXX | 6000–6999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7145 | OROVILLE | CA |
| 2015-05-26 | 530-955-4XXX | 4000–4999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7128 | NEVADACITY | CA |
| 2015-05-21 | 530-761-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | DAVIS | CA |
| 2015-05-19 | 530-717-4XXX | 4000–4999 | Assigned | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | CHICO | CA |
| 2015-05-18 | 530-691-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | REDDING | CA |
| 2015-05-18 | 530-721-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SOUTHTAHOE | CA |
| 2015-05-14 | 530-643-9XXX | 9000–9999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | YREKA | CA |
| 2015-05-13 | 530-768-3XXX | 3000–3999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | REDDING | CA |
| 2015-05-12 | 530-330-4XXX | 4000–4999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | WILLOWS | CA |
| 2015-05-12 | 530-629-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | WILLOW CRK | CA |
| 2015-04-30 | 530-293-4XXX | 4000–4999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7128 | PLVL KYBRZ | CA |
| 2015-04-30 | 530-600-4XXX | 4000–4999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | SOUTHTAHOE | CA |
| 2015-04-30 | 530-691-5XXX | 5000–5999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7128 | REDDING | CA |
| 2015-04-28 | 530-567-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | RED BLUFF | CA |
| 2015-04-28 | 530-737-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | RED BLUFF | CA |
| 2015-04-27 | 530-436-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | GRENADA | CA |
| 2015-04-27 | 530-639-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | SMARTSVL | CA |
| 2015-04-27 | 530-675-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | CHALLENGE | CA |
| 2015-04-27 | 530-728-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | GRVY SOUTH | CA |
| 2015-04-27 | 530-734-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | FRENCHGLCH | CA |
| 2015-04-27 | 530-839-3XXX | 3000–3999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | VINA | CA |
| 2015-04-24 | 530-556-2XXX | 2000–2999 | Assigned | COMCAST PHONE OF CALIFORNIA, LLC | 394L | SHINGLESPG | CA |
| 2015-04-23 | 530-552-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | OROVILLE | CA |
| 2015-04-23 | 530-552-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | OROVILLE | CA |
| 2015-04-21 | 530-801-2XXX | 2000–2999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7145 | CHICO | CA |
| 2015-04-16 | 530-443-0XXX | 0000–0999 | Assigned | T-MOBILE USA, INC. | 6529 | MARYSVILLE | CA |
| 2015-04-16 | 530-443-1XXX | 1000–1999 | Assigned | T-MOBILE USA, INC. | 6529 | MARYSVILLE | CA |
| 2015-04-16 | 530-443-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | MARYSVILLE | CA |
| 2015-04-16 | 530-786-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | AUBN MAIN | CA |
| 2015-04-16 | 530-786-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | AUBN MAIN | CA |
| 2015-04-16 | 530-786-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | AUBN MAIN | CA |
| 2015-04-13 | 530-420-7XXX | 7000–7999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | ROBBINS | CA |
| 2015-04-13 | 530-428-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | LOYALTON | CA |
| 2015-04-13 | 530-882-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | RICHVALE | CA |
| 2015-04-09 | 530-332-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | CHICO | CA |
| 2015-04-09 | 530-433-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | CHICO | CA |
| 2015-04-09 | 530-650-6XXX | 6000–6999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | WOODLAND | CA |
| 2015-04-09 | 530-715-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | CHICO | CA |
| 2015-04-07 | 530-291-5XXX | 5000–5999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | PLVL KYBRZ | CA |
| 2015-04-07 | 530-316-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | BLAIRSDEN | CA |
| 2015-04-07 | 530-444-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | GEORGETOWN | CA |
| 2015-04-07 | 530-464-5XXX | 5000–5999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | ALTA | CA |
| 2015-04-07 | 530-512-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | COLFAX | CA |
| 2015-04-07 | 530-536-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | TRUCKEE | CA |
| 2015-04-06 | 530-552-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | OROVILLE | CA |
| 2015-03-26 | 530-443-2XXX | 2000–2999 | Assigned | COMCAST PHONE OF CALIFORNIA, LLC | 394L | MARYSVILLE | 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.