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
2010-05-20 925-843-0XXX 0000–0999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 BSHP RNCH CA
2010-05-20 925-843-1XXX 1000–1999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 BSHP RNCH CA
2010-05-20 925-843-2XXX 2000–2999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 BSHP RNCH CA
2010-05-20 925-843-3XXX 3000–3999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 BSHP RNCH CA
2010-05-20 925-843-4XXX 4000–4999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 BSHP RNCH CA
2010-05-20 925-843-5XXX 5000–5999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 BSHP RNCH CA
2010-05-20 925-843-6XXX 6000–6999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 BSHP RNCH CA
2010-05-20 925-843-7XXX 7000–7999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 BSHP RNCH CA
2010-05-20 925-843-8XXX 8000–8999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 BSHP RNCH CA
2010-05-20 925-843-9XXX 9000–9999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 BSHP RNCH CA
2010-05-14 925-336-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E DUBLN-SNRM CA
2010-05-05 925-273-4XXX 4000–4999Assigned METROPCS, INC. 5562 LIVERMORE CA
2010-04-28 925-684-7XXX 7000–7999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L ECONTRCOST CA
2010-04-27 925-264-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PLEASANTON CA
2010-04-23 925-208-6XXX 6000–6999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F DANVILLE CA
2010-04-23 925-308-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E ECONTRCOST CA
2010-04-23 925-336-8XXX 8000–8999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F DUBLN-SNRM CA
2010-04-23 925-402-3XXX 3000–3999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F ORINDA CA
2010-04-23 925-493-5XXX 5000–5999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F LIVERMORE CA
2010-04-23 925-560-8XXX 8000–8999Assigned AT&T ENTERPRISES, LLC 516C DUBLN-SNRM CA
2010-04-23 925-789-4XXX 4000–4999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SUNOL CA
2010-04-20 925-269-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 MARTINEZ CA
2010-04-20 925-679-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C ECONTRCOST CA
2010-04-19 925-478-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 WALNUT CRK CA
2010-04-19 925-775-4XXX 4000–4999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L ANTIOCH CA
2010-04-05 925-967-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 DUBLN-SNRM CA
2010-04-02 925-353-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PLEASANTON CA
2010-03-31 925-953-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 WALNUT CRK CA
2010-03-23 925-587-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 DUBLN-SNRM CA
2010-03-23 925-822-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 CONCORD CA
2010-03-23 925-822-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 CONCORD CA
2010-03-11 925-965-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 PLEASANTON CA
2010-03-08 925-218-5XXX 5000–5999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F PLEASANTON CA
2010-03-08 925-403-3XXX 3000–3999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F LAFAYETTE CA
2010-03-08 925-498-5XXX 5000–5999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F BSHP RNCH CA
2010-03-08 925-592-8XXX 8000–8999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F MORAGA CA
2010-03-05 925-597-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 PITTSBURG CA
2010-03-05 925-808-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 CONCORD CA
2010-03-02 925-695-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E CONCORD CA
2010-02-16 925-303-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 ANTIOCH CA
2010-02-16 925-308-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C ECONTRCOST CA
2010-02-11 925-307-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C DUBLN-SNRM CA
2010-02-08 925-365-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C BSHP RNCH CA
2010-02-06 925-367-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C PLEASANTON CA
2010-02-06 925-765-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 WALNUT CRK CA
2010-02-05 925-321-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 LIVERMORE CA
2010-02-03 925-232-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E PSBG WEST CA
2010-02-03 925-238-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E ANTIOCH CA
2010-02-03 925-238-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E ANTIOCH CA
2010-02-03 925-240-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E ECONTRCOST 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.