NumberResearchRecent thousands-block assignments
2 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 909
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 |
|---|---|---|---|---|---|---|---|
| 2015-03-26 | 909-676-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | RIALTO | CA |
| 2015-03-20 | 909-681-3XXX | 3000–3999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | FONTANA | CA |
| 2015-03-13 | 909-681-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | FONTANA | CA |
| 2015-03-13 | 909-681-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | FONTANA | CA |
| 2015-03-13 | 909-681-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | FONTANA | CA |
| 2015-03-12 | 909-672-7XXX | 7000–7999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | HIGHLAND | CA |
| 2015-03-12 | 909-674-0XXX | 0000–0999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | REDLANDS | CA |
| 2015-03-12 | 909-699-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | COLTON | CA |
| 2015-03-03 | 909-360-0XXX | 0000–0999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | UPLAND | CA |
| 2015-03-03 | 909-372-1XXX | 1000–1999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | CALIMESA | CA |
| 2015-03-03 | 909-665-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | S BERNDINO | CA |
| 2015-03-03 | 909-665-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | S BERNDINO | CA |
| 2015-03-03 | 909-665-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | S BERNDINO | CA |
| 2015-02-25 | 909-352-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | MARSHALL | CA |
| 2015-02-25 | 909-572-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | COLTON | CA |
| 2015-02-25 | 909-572-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | COLTON | CA |
| 2015-02-25 | 909-672-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | HIGHLAND | CA |
| 2015-02-25 | 909-672-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | HIGHLAND | CA |
| 2015-02-25 | 909-675-3XXX | 3000–3999 | Assigned | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | CLAREMONT | CA |
| 2015-02-24 | 909-671-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | POMONA | CA |
| 2015-02-24 | 909-671-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | POMONA | CA |
| 2015-02-24 | 909-671-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | POMONA | CA |
| 2015-02-19 | 909-682-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | ARROWHEAD | CA |
| 2015-02-19 | 909-682-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | ARROWHEAD | CA |
| 2015-02-19 | 909-682-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | ARROWHEAD | CA |
| 2015-02-19 | 909-682-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | ARROWHEAD | CA |
| 2015-02-19 | 909-682-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | ARROWHEAD | CA |
| 2015-02-18 | 909-372-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | CALIMESA | CA |
| 2015-02-18 | 909-678-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | ONTARIO | CA |
| 2015-02-17 | 909-571-6XXX | 6000–6999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | S BERNDINO | CA |
| 2015-02-12 | 909-313-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | CHINO | CA |
| 2015-02-11 | 909-676-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | RIALTO | CA |
| 2015-02-10 | 909-360-6XXX | 6000–6999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | UPLAND | CA |
| 2015-02-05 | 909-551-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | DIAMONDBAR | CA |
| 2015-02-04 | 909-340-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | BIGBEAR LK | CA |
| 2015-02-04 | 909-375-4XXX | 4000–4999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | BIGBEAR CY | CA |
| 2015-02-04 | 909-375-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | BIGBEAR CY | CA |
| 2015-02-04 | 909-375-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | BIGBEAR CY | CA |
| 2015-01-30 | 909-637-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | FONTANA | CA |
| 2015-01-30 | 909-642-0XXX | 0000–0999 | Assigned | T-MOBILE USA, INC. | 6529 | FONTANA | CA |
| 2015-01-30 | 909-642-1XXX | 1000–1999 | Assigned | T-MOBILE USA, INC. | 6529 | FONTANA | CA |
| 2015-01-30 | 909-675-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | CLAREMONT | CA |
| 2015-01-30 | 909-675-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | CLAREMONT | CA |
| 2015-01-29 | 909-665-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | S BERNDINO | CA |
| 2015-01-29 | 909-665-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | S BERNDINO | CA |
| 2015-01-28 | 909-572-6XXX | 6000–6999 | Assigned | AT&T ENTERPRISES, LLC | 516C | COLTON | CA |
| 2015-01-26 | 909-372-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | CALIMESA | CA |
| 2015-01-26 | 909-654-4XXX | 4000–4999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | REDLANDS | CA |
| 2015-01-26 | 909-654-5XXX | 5000–5999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | REDLANDS | CA |
| 2015-01-26 | 909-654-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | REDLANDS | 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.