NumberResearchRecent thousands-block assignments
13 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 831
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 |
|---|---|---|---|---|---|---|---|
| 2026-05-21 | 831-329-2XXX | 2000–2999 | Assigned | ONVOY, LLC - CA | 649C | SALINAS | CA |
| 2026-05-20 | 831-880-1XXX | 1000–1999 | Assigned | 8X8, INC. | 193E | MONTEREY | CA |
| 2026-05-20 | 831-881-6XXX | 6000–6999 | Assigned | HD CARRIER LLC | 321J | MONTEREY | CA |
| 2026-05-20 | 831-881-7XXX | 7000–7999 | Assigned | HD CARRIER LLC | 321J | MONTEREY | CA |
| 2026-05-20 | 831-881-8XXX | 8000–8999 | Assigned | HD CARRIER LLC | 321J | MONTEREY | CA |
| 2026-05-15 | 831-270-5XXX | 5000–5999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | SALINAS | CA |
| 2026-05-11 | 831-203-9XXX | 9000–9999 | Assigned | TERRA NOVA TELECOM INC. | 145J | SALINAS | CA |
| 2026-05-11 | 831-274-9XXX | 9000–9999 | Assigned | TERRA NOVA TELECOM INC. | 145J | WATSONVL | CA |
| 2026-05-11 | 831-327-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | HOLLISTER | CA |
| 2026-05-11 | 831-612-8XXX | 8000–8999 | Assigned | TERRA NOVA TELECOM INC. | 145J | APTOS | CA |
| 2026-05-07 | 831-887-4XXX | 4000–4999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | MONTEREY | CA |
| 2026-04-29 | 831-279-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SALINAS | CA |
| 2026-04-07 | 831-340-7XXX | 7000–7999 | Assigned | TELNYX LLC | 073H | SANTA CRUZ | CA |
| 2026-04-03 | 831-203-7XXX | 7000–7999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | SALINAS | CA |
| 2026-04-03 | 831-203-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | SALINAS | CA |
| 2026-04-01 | 831-340-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SANTA CRUZ | CA |
| 2026-03-30 | 831-468-4XXX | 4000–4999 | Assigned | EXIANT COMMUNICATIONS LLC | 114J | MONTEREY | CA |
| 2026-03-23 | 831-339-8XXX | 8000–8999 | Assigned | PEERLESS NETWORK OF CALIFORNIA, LLC - CA | 373F | GONZALES | CA |
| 2026-03-12 | 831-328-7XXX | 7000–7999 | Assigned | ONVOY, LLC - CA | 649C | SALINAS | CA |
| 2026-02-17 | 831-665-8XXX | 8000–8999 | Assigned | TERRA NOVA TELECOM INC. | 145J | HOLLISTER | CA |
| 2026-01-30 | 831-340-8XXX | 8000–8999 | Assigned | ONVOY, LLC - CA | 649C | SANTA CRUZ | CA |
| 2026-01-13 | 831-620-3XXX | 3000–3999 | Assigned | ONVOY, LLC - CA | 649C | CARMEL | CA |
| 2026-01-12 | 831-641-8XXX | 8000–8999 | Assigned | TERRA NOVA TELECOM INC. | 145J | MONTEREY | CA |
| 2025-12-03 | 831-327-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | HOLLISTER | CA |
| 2025-11-12 | 831-808-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SOLEDAD | CA |
| 2025-10-30 | 831-327-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | HOLLISTER | CA |
| 2025-10-30 | 831-881-1XXX | 1000–1999 | Assigned | WIDE VOICE, LLC - CA | 252F | MONTEREY | CA |
| 2025-10-30 | 831-881-2XXX | 2000–2999 | Assigned | WIDE VOICE, LLC - CA | 252F | MONTEREY | CA |
| 2025-10-16 | 831-328-6XXX | 6000–6999 | Assigned | ONVOY, LLC - CA | 649C | SALINAS | CA |
| 2025-09-25 | 831-854-4XXX | 4000–4999 | Assigned | ONVOY, LLC - CA | 649C | SANTA CRUZ | CA |
| 2025-09-24 | 831-327-2XXX | 2000–2999 | Assigned | T-MOBILE USA, INC. | 6529 | HOLLISTER | CA |
| 2025-09-24 | 831-339-4XXX | 4000–4999 | Assigned | TELNYX LLC | 073H | GONZALES | CA |
| 2025-09-24 | 831-808-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SOLEDAD | CA |
| 2025-09-04 | 831-339-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | GONZALES | CA |
| 2025-09-03 | 831-515-4XXX | 4000–4999 | Assigned | ONVOY, LLC - CA | 649C | SANTA CRUZ | CA |
| 2025-08-27 | 831-284-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | WATSONVL | CA |
| 2025-08-12 | 831-329-0XXX | 0000–0999 | Assigned | TELNYX LLC | 073H | SALINAS | CA |
| 2025-08-11 | 831-901-2XXX | 2000–2999 | Assigned | WAVENATION, LLC | 700J | MONTEREY | CA |
| 2025-07-10 | 831-327-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | HOLLISTER | CA |
| 2025-06-09 | 831-281-6XXX | 6000–6999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SANTA CRUZ | CA |
| 2025-06-05 | 831-242-9XXX | 9000–9999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | MONTEREY | CA |
| 2025-06-05 | 831-274-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | WATSONVL | CA |
| 2025-05-09 | 831-329-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SALINAS | CA |
| 2025-05-09 | 831-329-9XXX | 9000–9999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SALINAS | CA |
| 2025-04-25 | 831-327-1XXX | 1000–1999 | Assigned | T-MOBILE USA, INC. | 6529 | HOLLISTER | CA |
| 2025-04-22 | 831-328-1XXX | 1000–1999 | Assigned | ONVOY SPECTRUM, LLC | 624H | SALINAS | CA |
| 2025-04-22 | 831-328-8XXX | 8000–8999 | Assigned | ONVOY SPECTRUM, LLC | 624H | SALINAS | CA |
| 2025-04-22 | 831-328-9XXX | 9000–9999 | Assigned | ONVOY SPECTRUM, LLC | 624H | SALINAS | CA |
| 2025-04-21 | 831-329-1XXX | 1000–1999 | Assigned | NUSO, LLC | 478J | SALINAS | CA |
| 2025-04-16 | 831-312-2XXX | 2000–2999 | Assigned | ONVOY, LLC - CA | 649C | MONTEREY | 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.