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
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Jan 2026
Dec 2025
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2015-09-15 | 909-314-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | S BERNDINO | CA |
| 2015-09-15 | 909-683-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | MARSHALL | CA |
| 2015-09-15 | 909-683-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | MARSHALL | CA |
| 2015-09-14 | 909-566-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | RIALTO | CA |
| 2015-09-14 | 909-566-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | RIALTO | CA |
| 2015-09-14 | 909-734-2XXX | 2000–2999 | Assigned | T-MOBILE USA, INC. | 6529 | ARROWHEAD | CA |
| 2015-09-14 | 909-734-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | ARROWHEAD | CA |
| 2015-09-14 | 909-734-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | ARROWHEAD | CA |
| 2015-09-11 | 909-727-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | UPLAND | CA |
| 2015-09-10 | 909-741-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | CLAREMONT | CA |
| 2015-09-10 | 909-741-9XXX | 9000–9999 | Assigned | METROPCS NETWORKS, LLC | 899D | CLAREMONT | CA |
| 2015-09-04 | 909-656-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | CLAREMONT | CA |
| 2015-09-04 | 909-656-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | CLAREMONT | CA |
| 2015-09-04 | 909-656-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | CLAREMONT | CA |
| 2015-09-04 | 909-656-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | CLAREMONT | CA |
| 2015-09-03 | 909-671-4XXX | 4000–4999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | POMONA | CA |
| 2015-09-03 | 909-735-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | REDLANDS | CA |
| 2015-09-03 | 909-735-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | REDLANDS | CA |
| 2015-08-26 | 909-314-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | S BERNDINO | CA |
| 2015-08-26 | 909-655-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | DIAMONDBAR | CA |
| 2015-08-26 | 909-735-8XXX | 8000–8999 | Assigned | IP HORIZON LLC | 515J | REDLANDS | CA |
| 2015-08-25 | 909-683-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | MARSHALL | CA |
| 2015-08-25 | 909-696-3XXX | 3000–3999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | CHINO | CA |
| 2015-08-24 | 909-372-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | CALIMESA | CA |
| 2015-08-21 | 909-324-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | RUNNINGSPG | CA |
| 2015-08-21 | 909-330-5XXX | 5000–5999 | Assigned | IP HORIZON LLC | 515J | ETIWANDA | CA |
| 2015-08-21 | 909-366-8XXX | 8000–8999 | Assigned | IP HORIZON LLC | 515J | BIGBEAR LK | CA |
| 2015-08-21 | 909-582-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | ARROWHEAD | CA |
| 2015-08-21 | 909-662-8XXX | 8000–8999 | Assigned | IP HORIZON LLC | 515J | CHINO | CA |
| 2015-08-21 | 909-671-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | POMONA | CA |
| 2015-08-21 | 909-683-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | MARSHALL | CA |
| 2015-08-21 | 909-686-3XXX | 3000–3999 | Assigned | IP HORIZON LLC | 515J | MENTONE | CA |
| 2015-08-21 | 909-687-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | ONTARIO | CA |
| 2015-08-11 | 909-566-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | RIALTO | CA |
| 2015-08-11 | 909-672-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | HIGHLAND | CA |
| 2015-08-11 | 909-695-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | FONTANA | CA |
| 2015-08-11 | 909-695-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | FONTANA | CA |
| 2015-08-11 | 909-696-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | CHINO | CA |
| 2015-08-11 | 909-736-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | UPLAND | CA |
| 2015-08-11 | 909-962-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | CLAREMONT | CA |
| 2015-08-06 | 909-501-0XXX | 0000–0999 | Assigned | FRONTIER CALIFORNIA INC. | 2319 | S BERNDINO | CA |
| 2015-08-05 | 909-314-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | S BERNDINO | CA |
| 2015-08-05 | 909-314-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | S BERNDINO | CA |
| 2015-08-05 | 909-314-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | S BERNDINO | CA |
| 2015-08-04 | 909-696-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | CHINO | CA |
| 2015-07-28 | 909-571-0XXX | 0000–0999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | S BERNDINO | CA |
| 2015-07-28 | 909-695-1XXX | 1000–1999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | FONTANA | CA |
| 2015-07-27 | 909-637-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | FONTANA | CA |
| 2015-07-27 | 909-681-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | FONTANA | CA |
| 2015-07-27 | 909-681-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | FONTANA | 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.