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
2004-04-29 510-478-8XXX 8000–8999Assigned METROPCS, INC. 5562 RICHMOND CA
2004-03-25 510-709-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 FRNK MAIN CA
2004-03-24 510-691-2XXX 2000–2999Assigned METROPCS, INC. 5562 HRCUL-RODE CA
2004-03-19 510-875-9XXX 9000–9999Assigned METROPCS, INC. 5562 OKLD TRNID CA
2004-03-18 510-467-3XXX 3000–3999Assigned METROPCS, INC. 5562 OKLD FRTVL CA
2004-03-18 510-467-4XXX 4000–4999Assigned METROPCS, INC. 5562 OKLD FRTVL CA
2004-03-18 510-467-5XXX 5000–5999Assigned METROPCS, INC. 5562 OKLD FRTVL CA
2004-03-18 510-467-6XXX 6000–6999Assigned METROPCS, INC. 5562 OKLD FRTVL CA
2004-03-18 510-467-7XXX 7000–7999Assigned METROPCS, INC. 5562 OKLD FRTVL CA
2004-03-18 510-467-8XXX 8000–8999Assigned METROPCS, INC. 5562 OKLD FRTVL CA
2004-03-18 510-467-9XXX 9000–9999Assigned METROPCS, INC. 5562 OKLD FRTVL CA
2004-03-18 510-689-3XXX 3000–3999Assigned METROPCS, INC. 5562 OKLD FRTVL CA
2004-03-18 510-689-4XXX 4000–4999Assigned METROPCS, INC. 5562 OKLD FRTVL CA
2004-03-18 510-689-6XXX 6000–6999Assigned METROPCS, INC. 5562 OKLD FRTVL CA
2004-03-18 510-689-7XXX 7000–7999Assigned METROPCS, INC. 5562 OKLD FRTVL CA
2004-03-18 510-689-8XXX 8000–8999Assigned METROPCS, INC. 5562 OKLD FRTVL CA
2004-03-18 510-689-9XXX 9000–9999Assigned METROPCS, INC. 5562 OKLD FRTVL CA
2004-03-18 510-712-1XXX 1000–1999Assigned METROPCS, INC. 5562 OKLD MN-PD CA
2004-03-18 510-712-2XXX 2000–2999Assigned METROPCS, INC. 5562 OKLD MN-PD CA
2004-03-18 510-712-3XXX 3000–3999Assigned METROPCS, INC. 5562 OKLD MN-PD CA
2004-03-18 510-712-4XXX 4000–4999Assigned METROPCS, INC. 5562 OKLD MN-PD CA
2004-03-18 510-712-5XXX 5000–5999Assigned METROPCS, INC. 5562 OKLD MN-PD CA
2004-03-18 510-712-6XXX 6000–6999Assigned METROPCS, INC. 5562 OKLD MN-PD CA
2004-03-18 510-712-7XXX 7000–7999Assigned METROPCS, INC. 5562 OKLD MN-PD CA
2004-03-18 510-712-8XXX 8000–8999Assigned METROPCS, INC. 5562 OKLD MN-PD CA
2004-03-18 510-712-9XXX 9000–9999Assigned METROPCS, INC. 5562 OKLD MN-PD CA
2004-03-15 510-455-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 CROCKETT CA
2004-03-12 510-213-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C OKLD FRTVL CA
2004-03-12 510-214-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C OKLD ALMD CA
2004-03-12 510-229-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C OKLD BKLY CA
2004-03-12 510-268-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C OKLD MN-PD CA
2004-03-12 510-692-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C OKLD TRNID CA
2004-03-01 510-229-6XXX 6000–6999Assigned METROPCS, INC. 5562 OKLD BKLY CA
2004-02-17 510-899-8XXX 8000–8999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J OKLD MN-PD CA
2004-02-04 510-709-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FRNK MAIN CA
2004-02-04 510-709-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FRNK MAIN CA
2004-02-04 510-709-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FRNK MAIN CA
2004-01-29 510-461-9XXX 9000–9999Assigned METROPCS, INC. 5562 HAYWARD CA
2003-12-23 510-296-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 HRCUL-RODE CA
2003-12-23 510-417-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 ELSBR-PINL CA
2003-12-23 510-567-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 OKLD TRNID CA
2003-11-20 510-512-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 HAYWARD CA
2003-11-20 510-512-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 HAYWARD CA
2003-11-20 510-585-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FRNK MAIN CA
2003-11-20 510-585-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FRNK MAIN CA
2003-11-20 510-585-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FRNK MAIN CA
2003-11-20 510-585-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FRNK MAIN CA
2003-11-18 510-265-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 HAYWARD CA
2003-11-07 510-260-8XXX 8000–8999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J RICHMOND CA
2003-10-23 510-860-0XXX 0000–0999Assigned METROPCS, INC. 5562 RICHMOND 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.