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
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Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2021-04-22 510-973-6XXX 6000–6999Assigned ONVOY SPECTRUM, LLC 624H OKLD BKLY CA
2021-04-22 510-973-7XXX 7000–7999Assigned ONVOY SPECTRUM, LLC 624H OKLD BKLY CA
2021-04-07 510-293-6XXX 6000–6999Assigned IP HORIZON LLC 515J HAYWARD CA
2021-04-07 510-488-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E OKLD FRTVL CA
2021-04-07 510-698-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E OKLD FRTVL CA
2021-04-07 510-832-9XXX 9000–9999Assigned IP HORIZON LLC 515J OKLD MN-PD CA
2021-04-06 510-903-6XXX 6000–6999Assigned SONIC TELECOM, LLC - CA 433E OKLD MN-PD CA
2021-04-06 510-916-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E OKLD TRNID CA
2021-04-06 510-916-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E OKLD TRNID CA
2021-04-06 510-916-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E OKLD TRNID CA
2021-03-30 510-214-9XXX 9000–9999Assigned TERRA NOVA TELECOM INC. 145J OKLD ALMD CA
2021-03-30 510-870-4XXX 4000–4999Assigned TERRA NOVA TELECOM INC. 145J FRNK GRNLF CA
2021-03-24 510-751-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 HAYWARD CA
2021-03-24 510-892-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 HAYWARD CA
2021-03-19 510-916-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C OKLD TRNID CA
2021-03-19 510-916-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C OKLD TRNID CA
2021-03-19 510-916-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C OKLD TRNID CA
2021-03-09 510-641-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 ELSBR-PINL CA
2021-03-09 510-641-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 ELSBR-PINL CA
2021-03-09 510-641-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 ELSBR-PINL CA
2021-03-09 510-641-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 ELSBR-PINL CA
2021-03-09 510-899-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 OKLD MN-PD CA
2021-03-09 510-899-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 OKLD MN-PD CA
2021-03-09 510-971-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 OKLD MN-PD CA
2021-03-09 510-973-0XXX 0000–0999Assigned SONIC TELECOM, LLC - CA 433E OKLD BKLY CA
2021-03-04 510-916-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 OKLD TRNID CA
2021-03-04 510-916-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 OKLD TRNID CA
2021-03-01 510-892-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 HAYWARD CA
2021-03-01 510-892-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 HAYWARD CA
2021-03-01 510-904-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 OKLD TRNID CA
2021-02-25 510-973-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 OKLD BKLY CA
2021-02-01 510-831-7XXX 7000–7999Assigned ONVOY SPECTRUM, LLC 624H RICHMOND CA
2021-02-01 510-960-8XXX 8000–8999Assigned ONVOY SPECTRUM, LLC 624H OKLD BKLY CA
2021-02-01 510-971-1XXX 1000–1999Assigned ONVOY SPECTRUM, LLC 624H OKLD MN-PD CA
2021-02-01 510-971-2XXX 2000–2999Assigned ONVOY SPECTRUM, LLC 624H OKLD MN-PD CA
2021-02-01 510-971-3XXX 3000–3999Assigned ONVOY SPECTRUM, LLC 624H OKLD MN-PD CA
2021-02-01 510-971-4XXX 4000–4999Assigned ONVOY SPECTRUM, LLC 624H OKLD MN-PD CA
2021-02-01 510-975-7XXX 7000–7999Assigned ONVOY SPECTRUM, LLC 624H OKLD ALMD CA
2021-02-01 510-977-0XXX 0000–0999Assigned ONVOY SPECTRUM, LLC 624H OKLD BKLY CA
2021-02-01 510-977-4XXX 4000–4999Assigned ONVOY SPECTRUM, LLC 624H OKLD BKLY CA
2021-02-01 510-977-6XXX 6000–6999Assigned ONVOY SPECTRUM, LLC 624H OKLD BKLY CA
2021-02-01 510-989-6XXX 6000–6999Assigned ONVOY SPECTRUM, LLC 624H OKLD BKLY CA
2021-02-01 510-994-3XXX 3000–3999Assigned ONVOY SPECTRUM, LLC 624H RICHMOND CA
2021-01-30 510-641-1XXX 1000–1999Assigned ONVOY SPECTRUM, LLC 624H ELSBR-PINL CA
2021-01-30 510-641-2XXX 2000–2999Assigned ONVOY SPECTRUM, LLC 624H ELSBR-PINL CA
2021-01-30 510-641-3XXX 3000–3999Assigned ONVOY SPECTRUM, LLC 624H ELSBR-PINL CA
2021-01-30 510-641-4XXX 4000–4999Assigned ONVOY SPECTRUM, LLC 624H ELSBR-PINL CA
2021-01-30 510-641-5XXX 5000–5999Assigned ONVOY SPECTRUM, LLC 624H ELSBR-PINL CA
2021-01-29 510-971-5XXX 5000–5999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 OKLD MN-PD CA
2021-01-28 510-327-1XXX 1000–1999Assigned TELNYX LLC 073H HRCUL-RODE 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.