NumberResearch Membership · Data 09/19/2026

Recent thousands-block assignments

4 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/19/2026

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
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Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2021-01-27 510-264-7XXX 7000–7999Assigned TELNYX LLC 073H HAYWARD CA
2021-01-20 510-751-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C HAYWARD CA
2021-01-20 510-751-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C HAYWARD CA
2021-01-07 510-831-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E RICHMOND CA
2021-01-07 510-831-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E RICHMOND CA
2021-01-07 510-831-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E RICHMOND CA
2021-01-07 510-831-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E RICHMOND CA
2021-01-07 510-831-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E RICHMOND CA
2020-12-23 510-971-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 OKLD MN-PD CA
2020-12-23 510-971-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 OKLD MN-PD CA
2020-12-23 510-971-8XXX 8000–8999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 OKLD MN-PD CA
2020-12-23 510-971-9XXX 9000–9999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 OKLD MN-PD CA
2020-12-11 510-544-1XXX 1000–1999Assigned TELNYX LLC 073H OKLD TRNID CA
2020-12-11 510-831-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E RICHMOND CA
2020-12-11 510-831-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E RICHMOND CA
2020-12-10 510-641-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ELSBR-PINL CA
2020-12-09 510-266-8XXX 8000–8999Assigned TERRA NOVA TELECOM INC. 145J HAYWARD CA
2020-12-09 510-279-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E FRNK OLIVR CA
2020-12-09 510-438-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E FRNK OLIVR CA
2020-12-09 510-438-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E FRNK OLIVR CA
2020-12-09 510-440-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E FRNK OLIVR CA
2020-12-09 510-619-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E RICHMOND CA
2020-12-09 510-619-1XXX 1000–1999Assigned TERRA NOVA TELECOM INC. 145J RICHMOND CA
2020-12-09 510-808-3XXX 3000–3999Assigned TERRA NOVA TELECOM INC. 145J OKLD MN-PD CA
2020-12-09 510-983-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E FRNK OLIVR CA
2020-12-09 510-994-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E RICHMOND CA
2020-12-04 510-613-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C OKLD TRNID CA
2020-12-04 510-777-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C OKLD TRNID CA
2020-12-02 510-823-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 OKLD MN-PD CA
2020-12-02 510-992-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 OKLD MN-PD CA
2020-12-02 510-992-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 OKLD MN-PD CA
2020-11-25 510-380-0XXX 0000–0999Assigned SONIC TELECOM, LLC - CA 433E OKLD MN-PD CA
2020-10-13 510-899-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 OKLD MN-PD CA
2020-10-13 510-899-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 OKLD MN-PD CA
2020-10-07 510-372-9XXX 9000–9999Assigned ONVOY SPECTRUM, LLC 624H HAYWARD CA
2020-09-29 510-346-9XXX 9000–9999Assigned METROPCS, INC. 5562 OKLD TRNID CA
2020-09-29 510-347-9XXX 9000–9999Assigned METROPCS, INC. 5562 OKLD TRNID CA
2020-09-29 510-419-9XXX 9000–9999Assigned METROPCS, INC. 5562 OKLD MN-PD CA
2020-09-29 510-444-9XXX 9000–9999Assigned METROPCS, INC. 5562 OKLD MN-PD CA
2020-09-20 510-380-2XXX 2000–2999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L OKLD MN-PD CA
2020-09-20 510-380-3XXX 3000–3999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L OKLD MN-PD CA
2020-09-20 510-380-4XXX 4000–4999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L OKLD MN-PD CA
2020-09-20 510-729-1XXX 1000–1999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L OKLD TRNID CA
2020-09-20 510-729-2XXX 2000–2999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L OKLD TRNID CA
2020-09-20 510-729-5XXX 5000–5999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L OKLD TRNID CA
2020-09-18 510-880-2XXX 2000–2999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L HAYWARD CA
2020-09-18 510-880-5XXX 5000–5999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L HAYWARD CA
2020-09-18 510-880-6XXX 6000–6999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L HAYWARD CA
2020-09-01 510-588-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 OKLD MN-PD CA
2020-09-01 510-588-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 OKLD MN-PD CA

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.