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
Clear Download CSV ↓
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 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.