NumberResearchRecent thousands-block assignments
1 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 323
New assignments by month
Sep 2026
Aug 2026
Jul 2026
Jun 2026
May 2026
Apr 2026
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Dec 2025
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2018-03-05 | 323-818-3XXX | 3000–3999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | LSAN DA 03 | CA |
| 2018-03-05 | 323-818-4XXX | 4000–4999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | LSAN DA 03 | CA |
| 2018-03-05 | 323-818-5XXX | 5000–5999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | LSAN DA 03 | CA |
| 2018-03-05 | 323-918-7XXX | 7000–7999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | LSAN DA 08 | CA |
| 2018-03-05 | 323-918-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | LSAN DA 08 | CA |
| 2018-03-05 | 323-918-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | LSAN DA 08 | CA |
| 2018-03-05 | 323-925-3XXX | 3000–3999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | LSAN DA 03 | CA |
| 2018-03-05 | 323-925-4XXX | 4000–4999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | LSAN DA 03 | CA |
| 2018-02-02 | 323-530-5XXX | 5000–5999 | Assigned | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | MONTEBELLO | CA |
| 2018-01-05 | 323-370-0XXX | 0000–0999 | Assigned | ONVOY, LLC - CA | 649C | LSAN DA 13 | CA |
| 2018-01-05 | 323-370-4XXX | 4000–4999 | Assigned | ONVOY, LLC - CA | 649C | LSAN DA 13 | CA |
| 2017-12-15 | 323-368-0XXX | 0000–0999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | LSAN DA 08 | CA |
| 2017-12-12 | 323-444-0XXX | 0000–0999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | LSAN DA 06 | CA |
| 2017-12-12 | 323-444-1XXX | 1000–1999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | LSAN DA 06 | CA |
| 2017-12-12 | 323-444-2XXX | 2000–2999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | LSAN DA 06 | CA |
| 2017-12-12 | 323-444-3XXX | 3000–3999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | LSAN DA 06 | CA |
| 2017-12-12 | 323-918-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | LSAN DA 08 | CA |
| 2017-12-11 | 323-763-2XXX | 2000–2999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | LSAN DA 06 | CA |
| 2017-12-07 | 323-530-1XXX | 1000–1999 | Assigned | ONVOY, LLC - CA | 649C | MONTEBELLO | CA |
| 2017-12-07 | 323-530-2XXX | 2000–2999 | Assigned | ONVOY, LLC - CA | 649C | MONTEBELLO | CA |
| 2017-12-05 | 323-763-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | LSAN DA 06 | CA |
| 2017-12-05 | 323-763-7XXX | 7000–7999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | LSAN DA 06 | CA |
| 2017-12-05 | 323-763-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | LSAN DA 06 | CA |
| 2017-12-05 | 323-763-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | LSAN DA 06 | CA |
| 2017-11-30 | 323-368-1XXX | 1000–1999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | LSAN DA 08 | CA |
| 2017-11-30 | 323-368-2XXX | 2000–2999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | LSAN DA 08 | CA |
| 2017-11-30 | 323-368-3XXX | 3000–3999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | LSAN DA 08 | CA |
| 2017-11-30 | 323-368-9XXX | 9000–9999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | LSAN DA 08 | CA |
| 2017-11-30 | 323-885-1XXX | 1000–1999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | LSAN DA 03 | CA |
| 2017-11-30 | 323-885-2XXX | 2000–2999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | LSAN DA 03 | CA |
| 2017-11-30 | 323-885-3XXX | 3000–3999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | LSAN DA 03 | CA |
| 2017-11-30 | 323-885-6XXX | 6000–6999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | LSAN DA 03 | CA |
| 2017-11-30 | 323-995-1XXX | 1000–1999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | LSAN DA 13 | CA |
| 2017-11-27 | 323-763-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | LSAN DA 06 | CA |
| 2017-11-27 | 323-763-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | LSAN DA 06 | CA |
| 2017-11-21 | 323-940-5XXX | 5000–5999 | Assigned | ONVOY, LLC - CA | 649C | LSAN DA 04 | CA |
| 2017-11-21 | 323-940-6XXX | 6000–6999 | Assigned | ONVOY, LLC - CA | 649C | LSAN DA 04 | CA |
| 2017-11-15 | 323-639-7XXX | 7000–7999 | Assigned | ONVOY, LLC - CA | 649C | LSAN DA 11 | CA |
| 2017-11-15 | 323-639-9XXX | 9000–9999 | Assigned | ONVOY, LLC - CA | 649C | LSAN DA 11 | CA |
| 2017-11-13 | 323-305-8XXX | 8000–8999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | LSAN DA 09 | CA |
| 2017-11-13 | 323-347-3XXX | 3000–3999 | Assigned | ONVOY, LLC - CA | 649C | LSAN DA 12 | CA |
| 2017-11-13 | 323-403-4XXX | 4000–4999 | Assigned | ONVOY, LLC - CA | 649C | LSAN DA 12 | CA |
| 2017-11-01 | 323-508-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | LSAN DA 12 | CA |
| 2017-11-01 | 323-940-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | LSAN DA 04 | CA |
| 2017-10-20 | 323-818-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | LSAN DA 03 | CA |
| 2017-10-18 | 323-918-3XXX | 3000–3999 | Assigned | ONVOY, LLC - CA | 649C | LSAN DA 08 | CA |
| 2017-10-18 | 323-918-4XXX | 4000–4999 | Assigned | ONVOY, LLC - CA | 649C | LSAN DA 08 | CA |
| 2017-10-18 | 323-918-5XXX | 5000–5999 | Assigned | ONVOY, LLC - CA | 649C | LSAN DA 08 | CA |
| 2017-10-13 | 323-302-6XXX | 6000–6999 | Assigned | METROPCS NETWORKS, LLC | 899D | LSAN DA 13 | CA |
| 2017-10-13 | 323-302-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | LSAN DA 13 | 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.