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
2003-07-15 510-996-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FRNK MAIN CA
2003-04-07 510-277-6XXX 6000–6999Assigned METROPCS, INC. 5562 OKLD BKLY CA
2003-04-07 510-277-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 OKLD BKLY CA
2003-04-07 510-338-5XXX 5000–5999Assigned METROPCS, INC. 5562 OKLD MN-PD CA
2003-03-26 510-258-4XXX 4000–4999Assigned METROPCS, INC. 5562 HAYWARD CA
2003-03-26 510-258-5XXX 5000–5999Assigned METROPCS, INC. 5562 HAYWARD CA
2003-03-26 510-258-6XXX 6000–6999Assigned METROPCS, INC. 5562 HAYWARD CA
2003-03-26 510-258-7XXX 7000–7999Assigned METROPCS, INC. 5562 HAYWARD CA
2003-03-25 510-228-2XXX 2000–2999Assigned METROPCS, INC. 5562 OKLD FRTVL CA
2003-03-25 510-228-5XXX 5000–5999Assigned METROPCS, INC. 5562 OKLD FRTVL CA
2003-03-25 510-228-6XXX 6000–6999Assigned METROPCS, INC. 5562 OKLD FRTVL CA
2003-03-25 510-228-7XXX 7000–7999Assigned METROPCS, INC. 5562 OKLD FRTVL CA
2003-03-25 510-228-8XXX 8000–8999Assigned METROPCS, INC. 5562 OKLD FRTVL CA
2003-03-25 510-228-9XXX 9000–9999Assigned METROPCS, INC. 5562 OKLD FRTVL CA
2003-03-25 510-395-0XXX 0000–0999Assigned METROPCS, INC. 5562 OKLD FRTVL CA
2003-03-25 510-395-1XXX 1000–1999Assigned METROPCS, INC. 5562 OKLD FRTVL CA
2003-03-25 510-395-2XXX 2000–2999Assigned METROPCS, INC. 5562 OKLD FRTVL CA
2003-03-25 510-395-3XXX 3000–3999Assigned METROPCS, INC. 5562 OKLD FRTVL CA
2003-03-25 510-395-4XXX 4000–4999Assigned METROPCS, INC. 5562 OKLD FRTVL CA
2003-03-25 510-395-5XXX 5000–5999Assigned METROPCS, INC. 5562 OKLD FRTVL CA
2003-03-25 510-395-6XXX 6000–6999Assigned METROPCS, INC. 5562 OKLD FRTVL CA
2003-03-25 510-395-7XXX 7000–7999Assigned METROPCS, INC. 5562 OKLD FRTVL CA
2003-03-25 510-978-0XXX 0000–0999Assigned METROPCS, INC. 5562 OKLD ALMD CA
2003-03-25 510-978-1XXX 1000–1999Assigned METROPCS, INC. 5562 OKLD ALMD CA
2003-03-25 510-978-2XXX 2000–2999Assigned METROPCS, INC. 5562 OKLD ALMD CA
2003-03-25 510-978-3XXX 3000–3999Assigned METROPCS, INC. 5562 OKLD ALMD CA
2003-03-25 510-978-5XXX 5000–5999Assigned METROPCS, INC. 5562 OKLD ALMD CA
2003-03-25 510-978-6XXX 6000–6999Assigned METROPCS, INC. 5562 OKLD ALMD CA
2003-03-25 510-978-7XXX 7000–7999Assigned METROPCS, INC. 5562 OKLD ALMD CA
2003-03-25 510-978-8XXX 8000–8999Assigned METROPCS, INC. 5562 OKLD ALMD CA
2003-03-25 510-978-9XXX 9000–9999Assigned METROPCS, INC. 5562 OKLD ALMD CA
2003-03-17 510-449-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FRNK MAIN CA
2003-03-17 510-449-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FRNK MAIN CA
2003-03-17 510-449-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FRNK MAIN CA
2003-02-14 510-439-3XXX 3000–3999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J RICHMOND CA
2003-02-14 510-485-5XXX 5000–5999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J OKLD FRTVL CA
2003-02-14 510-662-5XXX 5000–5999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J ELSBR-PINL CA
2003-02-14 510-899-7XXX 7000–7999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J OKLD MN-PD CA
2003-02-07 510-279-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 FRNK OLIVR CA
2003-01-17 510-759-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 OKLD MN-PD CA
2003-01-17 510-759-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 OKLD MN-PD CA
2003-01-17 510-759-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 OKLD MN-PD CA
2003-01-17 510-759-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 OKLD MN-PD CA
2003-01-17 510-759-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 OKLD MN-PD CA
2003-01-17 510-759-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 OKLD MN-PD CA
2003-01-15 510-253-5XXX 5000–5999Assigned METROPCS, INC. 5562 RICHMOND CA
2003-01-15 510-253-6XXX 6000–6999Assigned METROPCS, INC. 5562 RICHMOND CA
2003-01-15 510-253-7XXX 7000–7999Assigned METROPCS, INC. 5562 RICHMOND CA
2003-01-15 510-253-8XXX 8000–8999Assigned METROPCS, INC. 5562 RICHMOND CA
2003-01-15 510-253-9XXX 9000–9999Assigned 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.