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
2007-02-13 510-926-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 OKLD BKLY CA
2007-02-13 510-926-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 OKLD BKLY CA
2007-02-13 510-964-7XXX 7000–7999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L ELSBR-PINL CA
2007-02-12 510-584-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 HAYWARD CA
2007-02-12 510-952-9XXX 9000–9999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L FRNK GRNLF CA
2007-02-05 510-725-0XXX 0000–0999Assigned METROPCS, INC. 5562 OKLD BKLY CA
2007-01-31 510-662-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 ELSBR-PINL CA
2007-01-23 510-705-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 OKLD BKLY CA
2007-01-16 510-995-8XXX 8000–8999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L OKLD ALMD CA
2007-01-12 510-780-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HAYWARD CA
2007-01-12 510-881-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HAYWARD CA
2007-01-12 510-881-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HAYWARD CA
2007-01-09 510-877-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7240 OKLD TRNID CA
2006-12-28 510-373-9XXX 9000–9999Assigned ONVOY, LLC - CA 649C OKLD ALMD CA
2006-12-27 510-875-0XXX 0000–0999Assigned METROPCS, INC. 5562 OKLD TRNID CA
2006-12-27 510-878-0XXX 0000–0999Assigned METROPCS, INC. 5562 OKLD TRNID CA
2006-12-19 510-778-8XXX 8000–8999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L RICHMOND CA
2006-12-19 510-778-9XXX 9000–9999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L RICHMOND CA
2006-12-14 510-565-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FRNK MAIN CA
2006-12-14 510-647-6XXX 6000–6999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F OKLD BKLY CA
2006-12-14 510-896-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FRNK MAIN CA
2006-12-13 510-948-8XXX 8000–8999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L HRCUL-RODE CA
2006-12-11 510-856-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 HAYWARD CA
2006-11-22 510-809-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 OKLD BKLY CA
2006-11-21 510-922-1XXX 1000–1999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L OKLD MN-PD CA
2006-11-21 510-922-8XXX 8000–8999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L OKLD MN-PD CA
2006-11-21 510-922-9XXX 9000–9999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L OKLD MN-PD CA
2006-11-16 510-590-9XXX 9000–9999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 OKLD MN-PD CA
2006-10-19 510-283-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C ELSBR-PINL CA
2006-10-19 510-327-4XXX 4000–4999Assigned AT&T ENTERPRISES, LLC 516C HRCUL-RODE CA
2006-10-11 510-275-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 ELSBR-PINL CA
2006-10-05 510-969-4XXX 4000–4999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L OKLD TRNID CA
2006-10-05 510-969-5XXX 5000–5999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L OKLD TRNID CA
2006-09-19 510-550-8XXX 8000–8999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J OKLD MN-PD CA
2006-09-18 510-875-3XXX 3000–3999Assigned METROPCS, INC. 5562 OKLD TRNID CA
2006-09-14 510-647-8XXX 8000–8999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L OKLD BKLY CA
2006-09-14 510-647-9XXX 9000–9999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L OKLD BKLY CA
2006-09-13 510-566-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HAYWARD CA
2006-09-13 510-620-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RICHMOND CA
2006-09-13 510-621-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RICHMOND CA
2006-09-13 510-725-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 OKLD BKLY CA
2006-09-13 510-755-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HAYWARD CA
2006-09-13 510-846-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 OKLD ALMD CA
2006-09-13 510-857-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 FRNK MAIN CA
2006-09-13 510-857-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 FRNK MAIN CA
2006-09-13 510-965-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RICHMOND CA
2006-09-07 510-698-4XXX 4000–4999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L OKLD FRTVL CA
2006-09-07 510-842-3XXX 3000–3999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L OKLD FRTVL CA
2006-09-01 510-274-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 HAYWARD CA
2006-09-01 510-275-9XXX 9000–9999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L ELSBR-PINL 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.