NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

4 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/20/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

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 510
ONVOY, LLC - CA 3
BANDWIDTH.COM CLEC, LLC - CA 1
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
Clear Download CSV ↓
Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2014-12-01 510-942-4XXX 4000–4999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 RICHMOND CA
2014-11-25 510-753-8XXX 8000–8999Assigned METROPCS, INC. 5562 OKLD TRNID CA
2014-11-25 510-753-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 OKLD TRNID CA
2014-11-19 510-787-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 CROCKETT CA
2014-11-18 510-944-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 OKLD BKLY CA
2014-11-18 510-974-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 RICHMOND CA
2014-11-06 510-270-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E FRNK OLIVR CA
2014-11-06 510-413-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E FRNK OLIVR CA
2014-11-06 510-431-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E FRNK GRNLF CA
2014-11-06 510-675-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E FRNK GRNLF CA
2014-11-03 510-674-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C HAYWARD CA
2014-11-03 510-674-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C HAYWARD CA
2014-11-03 510-974-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RICHMOND CA
2014-11-03 510-974-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RICHMOND CA
2014-10-31 510-458-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 FRNK MAIN CA
2014-10-31 510-458-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 FRNK MAIN CA
2014-10-31 510-458-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 FRNK MAIN CA
2014-10-30 510-974-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C RICHMOND CA
2014-10-28 510-309-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 ELSBR-PINL CA
2014-10-28 510-309-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 ELSBR-PINL CA
2014-10-27 510-361-5XXX 5000–5999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 HAYWARD CA
2014-10-27 510-974-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E RICHMOND CA
2014-10-27 510-974-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E RICHMOND CA
2014-10-27 510-974-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E RICHMOND CA
2014-10-16 510-925-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 HAYWARD CA
2014-10-16 510-925-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 HAYWARD CA
2014-10-16 510-925-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 HAYWARD CA
2014-10-16 510-944-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C OKLD BKLY CA
2014-10-16 510-944-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C OKLD BKLY CA
2014-10-14 510-458-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FRNK MAIN CA
2014-10-14 510-560-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C OKLD TRNID CA
2014-10-14 510-634-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 HAYWARD CA
2014-10-14 510-634-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 HAYWARD CA
2014-10-14 510-634-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 HAYWARD CA
2014-10-14 510-925-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 HAYWARD CA
2014-10-14 510-925-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 HAYWARD CA
2014-10-13 510-757-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C OKLD MN-PD CA
2014-10-13 510-757-9XXX 9000–9999Assigned ONVOY, LLC - CA 649C OKLD MN-PD CA
2014-10-08 510-683-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C FRNK OLIVR CA
2014-10-08 510-824-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C FRNK OLIVR CA
2014-10-03 510-944-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 OKLD BKLY CA
2014-10-03 510-944-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 OKLD BKLY CA
2014-10-02 510-284-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E FRNK MAIN CA
2014-10-02 510-320-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E FRNK MAIN CA
2014-10-02 510-463-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C OKLD MN-PD CA
2014-10-02 510-634-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C HAYWARD CA
2014-10-02 510-952-0XXX 0000–0999Assigned AT&T ENTERPRISES, LLC 516C FRNK GRNLF CA
2014-10-02 510-953-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E FRNK MAIN CA
2014-10-01 510-480-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C ELSBR-PINL CA
2014-10-01 510-491-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C FRNK GRNLF 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.