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
2020-09-01 510-588-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 OKLD MN-PD CA
2020-08-20 510-729-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 OKLD TRNID CA
2020-08-12 510-992-5XXX 5000–5999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 OKLD MN-PD CA
2020-08-11 510-216-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 OKLD FRTVL CA
2020-08-11 510-216-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 OKLD FRTVL CA
2020-08-11 510-768-5XXX 5000–5999Assigned SONIC TELECOM, LLC - CA 433E OKLD MN-PD CA
2020-08-11 510-977-1XXX 1000–1999Assigned SONIC TELECOM, LLC - CA 433E OKLD BKLY CA
2020-08-10 510-662-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 ELSBR-PINL CA
2020-08-07 510-807-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 HAYWARD CA
2020-08-07 510-807-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 HAYWARD CA
2020-08-07 510-807-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 HAYWARD CA
2020-08-07 510-977-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 OKLD BKLY CA
2020-08-07 510-977-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 OKLD BKLY CA
2020-08-03 510-929-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 OKLD MN-PD CA
2020-08-03 510-929-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 OKLD MN-PD CA
2020-07-31 510-327-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C HRCUL-RODE CA
2020-07-31 510-519-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C OKLD ALMD CA
2020-07-31 510-617-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C HRCUL-RODE CA
2020-07-31 510-630-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C ELSBR-PINL CA
2020-07-31 510-630-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C ELSBR-PINL CA
2020-07-31 510-975-9XXX 9000–9999Assigned ONVOY, LLC - CA 649C OKLD ALMD CA
2020-07-24 510-994-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 RICHMOND CA
2020-07-10 510-607-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E OKLD MN-PD CA
2020-07-10 510-920-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E OKLD MN-PD CA
2020-07-10 510-920-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E OKLD MN-PD CA
2020-07-10 510-980-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E FRNK MAIN CA
2020-07-07 510-630-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 ELSBR-PINL CA
2020-07-07 510-630-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 ELSBR-PINL CA
2020-06-29 510-880-7XXX 7000–7999Assigned METROPCS, INC. 5562 HAYWARD CA
2020-06-29 510-880-8XXX 8000–8999Assigned METROPCS, INC. 5562 HAYWARD CA
2020-06-29 510-977-5XXX 5000–5999Assigned SONIC TELECOM, LLC - CA 433E OKLD BKLY CA
2020-06-22 510-617-2XXX 2000–2999Assigned ONVOY SPECTRUM, LLC 624H HRCUL-RODE CA
2020-06-22 510-617-3XXX 3000–3999Assigned ONVOY SPECTRUM, LLC 624H HRCUL-RODE CA
2020-06-22 510-617-4XXX 4000–4999Assigned ONVOY SPECTRUM, LLC 624H HRCUL-RODE CA
2020-06-19 510-630-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ELSBR-PINL CA
2020-06-17 510-419-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 OKLD MN-PD CA
2020-06-17 510-943-6XXX 6000–6999Assigned METROPCS, INC. 5562 FRNK MAIN CA
2020-06-17 510-975-5XXX 5000–5999Assigned METROPCS, INC. 5562 OKLD ALMD CA
2020-06-17 510-975-6XXX 6000–6999Assigned METROPCS, INC. 5562 OKLD ALMD CA
2020-06-17 510-975-8XXX 8000–8999Assigned METROPCS, INC. 5562 OKLD ALMD CA
2020-06-16 510-347-8XXX 8000–8999Assigned VONAGE AMERICA LLC 197D OKLD TRNID CA
2020-06-16 510-955-0XXX 0000–0999Assigned VONAGE AMERICA LLC 197D OKLD TRNID CA
2020-06-10 510-975-3XXX 3000–3999Assigned VONAGE AMERICA LLC 197D OKLD ALMD CA
2020-06-10 510-975-4XXX 4000–4999Assigned VONAGE AMERICA LLC 197D OKLD ALMD CA
2020-06-03 510-994-4XXX 4000–4999Assigned VONAGE AMERICA LLC 197D RICHMOND CA
2020-06-03 510-994-5XXX 5000–5999Assigned VONAGE AMERICA LLC 197D RICHMOND CA
2020-06-02 510-607-7XXX 7000–7999Assigned SONIC TELECOM, LLC - CA 433E OKLD MN-PD CA
2020-05-22 510-607-0XXX 0000–0999Assigned VONAGE AMERICA LLC 197D OKLD MN-PD CA
2020-05-22 510-607-1XXX 1000–1999Assigned VONAGE AMERICA LLC 197D OKLD MN-PD CA
2020-05-18 510-445-7XXX 7000–7999Assigned VONAGE AMERICA LLC 197D FRNK OLIVR 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.