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
2011-06-09 925-752-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 ANTIOCH CA
2011-06-08 925-482-0XXX 0000–0999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L WALNUT CRK CA
2011-06-08 925-961-2XXX 2000–2999Assigned METROPCS, INC. 5562 LIVERMORE CA
2011-06-07 925-302-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 BSHP RNCH CA
2011-05-31 925-222-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E CONCORD CA
2011-05-31 925-268-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E MORAGA CA
2011-05-31 925-291-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E PSBG WEST CA
2011-05-31 925-307-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E DUBLN-SNRM CA
2011-05-31 925-315-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LIVERMORE CA
2011-05-31 925-318-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E PITTSBURG CA
2011-05-13 925-222-6XXX 6000–6999Assigned PAETEC ITEL, LLC 829J CONCORD CA
2011-05-10 925-222-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C CONCORD CA
2011-05-10 925-322-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E WALNUT CRK CA
2011-05-10 925-322-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E WALNUT CRK CA
2011-05-10 925-322-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E WALNUT CRK CA
2011-05-09 925-222-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 CONCORD CA
2011-05-06 925-302-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E BSHP RNCH CA
2011-05-06 925-315-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LIVERMORE CA
2011-05-06 925-575-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E DANVILLE CA
2011-05-06 925-575-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E DANVILLE CA
2011-05-04 925-264-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E PLEASANTON CA
2011-05-04 925-269-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E MARTINEZ CA
2011-05-04 925-308-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E ECONTRCOST CA
2011-05-04 925-392-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E ECONTRCOST CA
2011-05-04 925-399-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E PLEASANTON CA
2011-05-04 925-529-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E ANTIOCH CA
2011-05-04 925-529-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E ANTIOCH CA
2011-04-25 925-500-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C MARTINEZ CA
2011-04-20 925-203-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PITTSBURG CA
2011-04-20 925-520-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PLEASANTON CA
2011-04-14 925-247-5XXX 5000–5999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L MORAGA CA
2011-04-11 925-475-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PLEASANTON CA
2011-04-11 925-951-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 WALNUT CRK CA
2011-04-08 925-551-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 DUBLN-SNRM CA
2011-04-07 925-222-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 CONCORD CA
2011-04-07 925-727-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 ANTIOCH CA
2011-03-31 925-230-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 DUBLN-SNRM CA
2011-03-31 925-724-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C LIVERMORE CA
2011-03-28 925-529-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ANTIOCH CA
2011-03-25 925-314-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 DANVILLE CA
2011-03-25 925-389-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 DANVILLE CA
2011-03-25 925-960-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 LIVERMORE CA
2011-03-25 925-960-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 LIVERMORE CA
2011-03-02 925-257-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E ORINDA CA
2011-02-25 925-889-9XXX 9000–9999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L CLAYTON CA
2011-02-17 925-956-3XXX 3000–3999Assigned METROPCS, INC. 5562 WALNUT CRK CA
2011-02-10 925-222-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 CONCORD CA
2011-02-10 925-348-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 CONCORD CA
2011-02-09 925-529-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 ANTIOCH CA
2011-01-26 925-364-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E DUBLN-SNRM 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.