NumberResearchRecent thousands-block assignments
12 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 424
New assignments by month
Sep 2026
Aug 2026
Jul 2026
Jun 2026
May 2026
Apr 2026
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Feb 2026
Jan 2026
Dec 2025
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2015-03-04 | 424-375-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | CMTN GRDN | CA |
| 2015-03-03 | 424-297-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | HAWTHORNE | CA |
| 2015-03-03 | 424-374-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | HAWTHORNE | CA |
| 2015-03-03 | 424-376-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | TORRANCE | CA |
| 2015-02-25 | 424-334-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | AVALON | CA |
| 2015-02-24 | 424-386-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | BEVERLYHLS | CA |
| 2015-02-24 | 424-386-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | BEVERLYHLS | CA |
| 2015-02-24 | 424-386-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | BEVERLYHLS | CA |
| 2015-02-24 | 424-386-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | BEVERLYHLS | CA |
| 2015-02-24 | 424-393-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | INGLEWOOD | CA |
| 2015-02-24 | 424-393-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | INGLEWOOD | CA |
| 2015-02-24 | 424-393-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | INGLEWOOD | CA |
| 2015-02-24 | 424-395-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | MALIBU | CA |
| 2015-02-24 | 424-395-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | MALIBU | CA |
| 2015-02-24 | 424-395-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | MALIBU | CA |
| 2015-02-19 | 424-382-2XXX | 2000–2999 | Assigned | T-MOBILE USA, INC. | 6529 | BEVERLYHLS | CA |
| 2015-02-19 | 424-382-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | BEVERLYHLS | CA |
| 2015-02-19 | 424-382-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | BEVERLYHLS | CA |
| 2015-02-19 | 424-385-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | CULVERCITY | CA |
| 2015-02-19 | 424-385-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | CULVERCITY | CA |
| 2015-02-19 | 424-385-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | CULVERCITY | CA |
| 2015-02-17 | 424-301-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | EL SEGUNDO | CA |
| 2015-02-12 | 424-301-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | EL SEGUNDO | CA |
| 2015-02-09 | 424-375-0XXX | 0000–0999 | Assigned | T-MOBILE USA, INC. | 6529 | CMTN GRDN | CA |
| 2015-02-09 | 424-375-1XXX | 1000–1999 | Assigned | T-MOBILE USA, INC. | 6529 | CMTN GRDN | CA |
| 2015-01-29 | 424-367-5XXX | 5000–5999 | Assigned | LEVEL 3 TELECOM OF CALIFORNIA, LP - CA | 7718 | EL SEGUNDO | CA |
| 2015-01-29 | 424-382-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | BEVERLYHLS | CA |
| 2015-01-29 | 424-382-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | BEVERLYHLS | CA |
| 2015-01-29 | 424-382-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | BEVERLYHLS | CA |
| 2015-01-23 | 424-387-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | SNMN SNMN | CA |
| 2015-01-20 | 424-385-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | CULVERCITY | CA |
| 2015-01-16 | 424-384-6XXX | 6000–6999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7139 | SNMN MRVS | CA |
| 2015-01-09 | 424-381-4XXX | 4000–4999 | Assigned | AT&T ENTERPRISES, LLC | 516C | CMTN CMTN | CA |
| 2015-01-08 | 424-353-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | SNMN MRVS | CA |
| 2015-01-08 | 424-367-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | EL SEGUNDO | CA |
| 2015-01-08 | 424-374-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | HAWTHORNE | CA |
| 2015-01-08 | 424-382-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | BEVERLYHLS | CA |
| 2015-01-08 | 424-382-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | BEVERLYHLS | CA |
| 2015-01-06 | 424-375-9XXX | 9000–9999 | Assigned | METROPCS NETWORKS, LLC | 899D | CMTN GRDN | CA |
| 2014-12-31 | 424-393-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | INGLEWOOD | CA |
| 2014-12-31 | 424-393-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | INGLEWOOD | CA |
| 2014-12-18 | 424-368-7XXX | 7000–7999 | Assigned | PAETEC ITEL, LLC | 829J | SAN PEDRO | CA |
| 2014-12-15 | 424-381-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | CMTN CMTN | CA |
| 2014-12-15 | 424-381-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | CMTN CMTN | CA |
| 2014-12-15 | 424-381-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | CMTN CMTN | CA |
| 2014-12-11 | 424-375-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | CMTN GRDN | CA |
| 2014-12-11 | 424-375-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | CMTN GRDN | CA |
| 2014-12-05 | 424-368-1XXX | 1000–1999 | Assigned | METROPCS NETWORKS, LLC | 899D | SAN PEDRO | CA |
| 2014-12-05 | 424-376-2XXX | 2000–2999 | Assigned | METROPCS NETWORKS, LLC | 899D | TORRANCE | CA |
| 2014-12-03 | 424-371-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | W ANGELES | 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.