NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

35 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 925
ONVOY, LLC - CA 24
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 5
BANDWIDTH.COM CLEC, LLC - CA 2
TELNYX LLC 1
T-MOBILE USA, INC. 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
2011-09-13 925-357-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 WALNUT CRK CA
2011-09-07 925-322-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 WALNUT CRK CA
2011-09-07 925-364-7XXX 7000–7999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L DUBLN-SNRM CA
2011-09-07 925-918-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PLEASANTON CA
2011-09-02 925-293-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7240 MARTINEZ CA
2011-09-02 925-298-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7240 LAFAYETTE CA
2011-09-02 925-338-3XXX 3000–3999Assigned METROPCS, INC. 5562 CONCORD CA
2011-09-02 925-338-4XXX 4000–4999Assigned METROPCS, INC. 5562 CONCORD CA
2011-09-02 925-529-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7240 ANTIOCH CA
2011-09-02 925-964-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 DANVILLE CA
2011-09-01 925-322-8XXX 8000–8999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L WALNUT CRK CA
2011-09-01 925-553-7XXX 7000–7999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L DANVILLE CA
2011-08-31 925-513-5XXX 5000–5999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L ECONTRCOST CA
2011-08-30 925-529-7XXX 7000–7999Assigned METROPCS, INC. 5562 ANTIOCH CA
2011-08-24 925-223-8XXX 8000–8999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L PLEASANTON CA
2011-08-24 925-317-3XXX 3000–3999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L ORINDA CA
2011-08-23 925-400-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E PLEASANTON CA
2011-08-19 925-344-7XXX 7000–7999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L LIVERMORE CA
2011-08-04 925-338-2XXX 2000–2999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L CONCORD CA
2011-08-03 925-291-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E PSBG WEST CA
2011-08-03 925-322-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E WALNUT CRK CA
2011-07-28 925-268-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E MORAGA CA
2011-07-28 925-344-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LIVERMORE CA
2011-07-22 925-293-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E MARTINEZ CA
2011-07-22 925-338-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E CONCORD CA
2011-07-22 925-338-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E CONCORD CA
2011-07-20 925-344-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LIVERMORE CA
2011-07-20 925-359-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E BSHP RNCH CA
2011-07-19 925-276-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E CLAYTON CA
2011-07-19 925-334-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 CONCORD CA
2011-07-19 925-334-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 CONCORD CA
2011-07-13 925-314-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 DANVILLE CA
2011-07-13 925-336-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 DUBLN-SNRM CA
2011-07-13 925-431-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PITTSBURG CA
2011-07-13 925-529-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ANTIOCH CA
2011-07-11 925-453-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LIVERMORE CA
2011-07-06 925-771-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 CONCORD CA
2011-07-06 925-771-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 CONCORD CA
2011-06-30 925-276-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E CLAYTON CA
2011-06-30 925-726-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E CONCORD CA
2011-06-30 925-849-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E CONCORD CA
2011-06-29 925-322-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C WALNUT CRK CA
2011-06-29 925-322-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C WALNUT CRK CA
2011-06-29 925-594-5XXX 5000–5999Assigned PAETEC ITEL, LLC 829J DANVILLE CA
2011-06-28 925-322-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 WALNUT CRK CA
2011-06-28 925-596-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PLEASANTON CA
2011-06-28 925-849-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 CONCORD CA
2011-06-27 925-222-7XXX 7000–7999Assigned METROPCS, INC. 5562 CONCORD CA
2011-06-27 925-222-9XXX 9000–9999Assigned METROPCS, INC. 5562 CONCORD CA
2011-06-10 925-658-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 WALNUT CRK 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.