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
2008-01-08 510-479-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 OKLD FRTVL CA
2008-01-08 510-529-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 OKLD BKLY CA
2008-01-08 510-695-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 HAYWARD CA
2008-01-08 510-778-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 RICHMOND CA
2007-12-27 510-695-6XXX 6000–6999Assigned METROPCS, INC. 5562 HAYWARD CA
2007-12-27 510-695-7XXX 7000–7999Assigned METROPCS, INC. 5562 HAYWARD CA
2007-12-27 510-695-8XXX 8000–8999Assigned METROPCS, INC. 5562 HAYWARD CA
2007-12-27 510-695-9XXX 9000–9999Assigned METROPCS, INC. 5562 HAYWARD CA
2007-12-21 510-926-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C OKLD BKLY CA
2007-11-28 510-356-1XXX 1000–1999Assigned PACIFIC BELL 9740 OKLD BKLY CA
2007-11-28 510-356-9XXX 9000–9999Assigned PACIFIC BELL 9740 OKLD BKLY CA
2007-11-28 510-403-7XXX 7000–7999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J FRNK OLIVR CA
2007-11-28 510-698-3XXX 3000–3999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J OKLD FRTVL CA
2007-11-28 510-837-6XXX 6000–6999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J RICHMOND CA
2007-11-21 510-250-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 OKLD MN-PD CA
2007-11-21 510-695-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 HAYWARD CA
2007-11-12 510-227-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 OKLD ALMD CA
2007-11-12 510-778-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 RICHMOND CA
2007-11-07 510-648-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 FRNK MAIN CA
2007-11-07 510-666-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 OKLD BKLY CA
2007-11-07 510-695-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 HAYWARD CA
2007-10-22 510-564-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 OKLD TRNID CA
2007-10-22 510-984-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 OKLD BKLY CA
2007-10-15 510-692-3XXX 3000–3999Assigned METROPCS, INC. 5562 OKLD TRNID CA
2007-09-25 510-837-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RICHMOND CA
2007-09-18 510-314-0XXX 0000–0999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L HAYWARD CA
2007-09-17 510-493-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FRNK MAIN CA
2007-09-14 510-926-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 OKLD BKLY CA
2007-09-13 510-926-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 OKLD BKLY CA
2007-09-13 510-926-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 OKLD BKLY CA
2007-08-23 510-269-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 OKLD FRTVL CA
2007-08-23 510-705-1XXX 1000–1999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L OKLD BKLY CA
2007-08-20 510-695-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HAYWARD CA
2007-08-20 510-695-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HAYWARD CA
2007-08-20 510-695-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HAYWARD CA
2007-08-10 510-314-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 HAYWARD CA
2007-08-10 510-926-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 OKLD BKLY CA
2007-08-09 510-565-1XXX 1000–1999Assigned AT&T ENTERPRISES, LLC 516C FRNK MAIN CA
2007-08-06 510-383-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 OKLD TRNID CA
2007-07-20 510-648-2XXX 2000–2999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L FRNK MAIN CA
2007-07-20 510-735-9XXX 9000–9999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L OKLD MN-PD CA
2007-07-19 510-230-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 RICHMOND CA
2007-07-19 510-846-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 OKLD ALMD CA
2007-07-17 510-283-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 ELSBR-PINL CA
2007-07-16 510-314-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 HAYWARD CA
2007-07-16 510-493-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 FRNK MAIN CA
2007-07-16 510-859-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 OKLD BKLY CA
2007-07-02 510-314-4XXX 4000–4999Assigned METROPCS, INC. 5562 HAYWARD CA
2007-07-02 510-314-5XXX 5000–5999Assigned METROPCS, INC. 5562 HAYWARD CA
2007-07-02 510-314-6XXX 6000–6999Assigned METROPCS, INC. 5562 HAYWARD 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.