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
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2015-07-31 | 323-287-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | LSAN DA 04 | CA |
| 2015-07-31 | 323-342-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | LSAN DA 04 | CA |
| 2015-07-31 | 323-441-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | LSAN DA 04 | CA |
| 2015-07-31 | 323-539-1XXX | 1000–1999 | Assigned | T-MOBILE USA, INC. | 6529 | LSAN DA 04 | CA |
| 2015-07-30 | 323-504-0XXX | 0000–0999 | Assigned | T-MOBILE USA, INC. | 6529 | LSAN DA 14 | CA |
| 2015-07-30 | 323-504-1XXX | 1000–1999 | Assigned | T-MOBILE USA, INC. | 6529 | LSAN DA 14 | CA |
| 2015-07-30 | 323-504-2XXX | 2000–2999 | Assigned | T-MOBILE USA, INC. | 6529 | LSAN DA 14 | CA |
| 2015-07-30 | 323-504-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | LSAN DA 14 | CA |
| 2015-07-30 | 323-504-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | LSAN DA 14 | CA |
| 2015-07-30 | 323-504-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | LSAN DA 14 | CA |
| 2015-07-30 | 323-975-0XXX | 0000–0999 | Assigned | T-MOBILE USA, INC. | 6529 | LSAN DA 03 | CA |
| 2015-07-30 | 323-975-1XXX | 1000–1999 | Assigned | T-MOBILE USA, INC. | 6529 | LSAN DA 03 | CA |
| 2015-07-30 | 323-975-2XXX | 2000–2999 | Assigned | T-MOBILE USA, INC. | 6529 | LSAN DA 03 | CA |
| 2015-07-16 | 323-847-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | LSAN DA 13 | CA |
| 2015-07-15 | 323-593-4XXX | 4000–4999 | Assigned | ONVOY, LLC - CA | 649C | LSAN DA 02 | CA |
| 2015-07-15 | 323-593-5XXX | 5000–5999 | Assigned | ONVOY, LLC - CA | 649C | LSAN DA 02 | CA |
| 2015-07-10 | 323-471-0XXX | 0000–0999 | Assigned | ONVOY, LLC - CA | 649C | LSAN DA 14 | CA |
| 2015-07-10 | 323-471-1XXX | 1000–1999 | Assigned | ONVOY, LLC - CA | 649C | LSAN DA 14 | CA |
| 2015-07-09 | 323-327-0XXX | 0000–0999 | Assigned | T-MOBILE USA, INC. | 6529 | LSAN DA 09 | CA |
| 2015-07-09 | 323-448-1XXX | 1000–1999 | Assigned | T-MOBILE USA, INC. | 6529 | LSAN DA 09 | CA |
| 2015-07-09 | 323-492-2XXX | 2000–2999 | Assigned | T-MOBILE USA, INC. | 6529 | LSAN DA 09 | CA |
| 2015-07-09 | 323-492-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | LSAN DA 09 | CA |
| 2015-07-09 | 323-492-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | LSAN DA 09 | CA |
| 2015-07-09 | 323-570-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | LSAN DA 09 | CA |
| 2015-07-09 | 323-570-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | LSAN DA 09 | CA |
| 2015-07-09 | 323-781-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | LSAN DA 09 | CA |
| 2015-07-09 | 323-781-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | LSAN DA 09 | CA |
| 2015-07-09 | 323-977-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | LSAN DA 09 | CA |
| 2015-07-07 | 323-765-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | MONTEBELLO | CA |
| 2015-07-07 | 323-897-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | LSAN DA 08 | CA |
| 2015-07-06 | 323-749-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | LSAN DA 06 | CA |
| 2015-07-06 | 323-749-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | LSAN DA 06 | CA |
| 2015-07-06 | 323-749-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | LSAN DA 06 | CA |
| 2015-07-06 | 323-749-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | LSAN DA 06 | CA |
| 2015-06-30 | 323-406-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | LSAN DA 05 | CA |
| 2015-06-30 | 323-409-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | LSAN DA 04 | CA |
| 2015-06-30 | 323-409-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | LSAN DA 04 | CA |
| 2015-06-30 | 323-433-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | LSAN DA 13 | CA |
| 2015-06-30 | 323-433-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | LSAN DA 13 | CA |
| 2015-06-30 | 323-433-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | LSAN DA 13 | CA |
| 2015-06-30 | 323-488-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | LSAN DA 05 | CA |
| 2015-06-30 | 323-505-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | LSAN DA 04 | CA |
| 2015-06-30 | 323-676-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | LSAN DA 08 | CA |
| 2015-06-30 | 323-686-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | LSAN DA 04 | CA |
| 2015-06-30 | 323-825-7XXX | 7000–7999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | LSAN DA 05 | CA |
| 2015-06-30 | 323-940-3XXX | 3000–3999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | LSAN DA 04 | CA |
| 2015-06-23 | 323-593-6XXX | 6000–6999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | LSAN DA 02 | CA |
| 2015-06-12 | 323-946-6XXX | 6000–6999 | Assigned | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | LSAN DA 14 | CA |
| 2015-06-12 | 323-946-7XXX | 7000–7999 | Assigned | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | LSAN DA 14 | CA |
| 2015-06-11 | 323-421-6XXX | 6000–6999 | Assigned | AT&T ENTERPRISES, LLC | 516C | LSAN DA 12 | 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.