NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

1 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 415
BOOST SUBSCRIBERCO L.L.C. 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
2010-03-05 415-689-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC MT-EV CA
2010-03-04 415-817-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC CNTRL CA
2010-03-02 415-236-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E INVERNESS CA
2010-02-26 415-839-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SNFC CNTRL CA
2010-02-26 415-970-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SNFC CNTRL CA
2010-02-23 415-226-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C SAN RAFAEL CA
2010-02-16 415-796-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC CNTRL CA
2010-02-11 415-748-3XXX 3000–3999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNFC CNTRL CA
2010-02-11 415-796-7XXX 7000–7999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNFC CNTRL CA
2010-02-11 415-820-4XXX 4000–4999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNFC CNTRL CA
2010-02-11 415-821-8XXX 8000–8999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNFC CNTRL CA
2010-02-04 415-547-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2010-02-04 415-693-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2010-02-04 415-705-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2010-02-04 415-732-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2010-02-04 415-937-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 BELVEDERE CA
2010-01-29 415-320-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E NOVATO CA
2010-01-29 415-320-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E NOVATO CA
2010-01-29 415-413-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E CORTEMADRA CA
2010-01-29 415-413-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E CORTEMADRA CA
2010-01-29 415-484-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E STNSN-BLNS CA
2010-01-29 415-484-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E STNSN-BLNS CA
2010-01-29 415-506-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E IGNACIO CA
2010-01-29 415-506-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E IGNACIO CA
2010-01-29 415-506-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E IGNACIO CA
2010-01-29 415-754-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SAUSALITO CA
2010-01-29 415-754-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SAUSALITO CA
2010-01-29 415-754-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SAUSALITO CA
2010-01-28 415-236-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E INVERNESS CA
2010-01-28 415-273-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNFC CNTRL CA
2010-01-28 415-322-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E MILLVALLEY CA
2010-01-28 415-322-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E MILLVALLEY CA
2010-01-28 415-323-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E NICASIO CA
2010-01-28 415-323-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E NICASIO CA
2010-01-28 415-355-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNFC CNTRL CA
2010-01-28 415-364-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNFC CNTRL CA
2010-01-28 415-371-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNFC CNTRL CA
2010-01-28 415-409-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNFC CNTRL CA
2010-01-28 415-409-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNFC CNTRL CA
2010-01-28 415-439-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNFC CNTRL CA
2010-01-28 415-488-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SAN RAFAEL CA
2010-01-28 415-488-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SAN RAFAEL CA
2010-01-28 415-489-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNFC CNTRL CA
2010-01-28 415-498-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNFC CNTRL CA
2010-01-28 415-501-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNFC CNTRL CA
2010-01-28 415-545-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNFC CNTRL CA
2010-01-28 415-547-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNFC CNTRL CA
2010-01-28 415-578-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SAN RAFAEL CA
2010-01-28 415-691-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E BELVEDERE CA
2010-01-28 415-787-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E POINTREYES 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.