NumberResearch Membership · Data 09/21/2026

Recent thousands-block assignments

1 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/21/2026

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
2011-07-25 415-266-3XXX 3000–3999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNFC CNTRL CA
2011-07-25 415-266-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNFC CNTRL CA
2011-07-25 415-266-5XXX 5000–5999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNFC CNTRL CA
2011-07-25 415-266-6XXX 6000–6999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNFC CNTRL CA
2011-07-25 415-266-7XXX 7000–7999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNFC CNTRL CA
2011-07-25 415-266-8XXX 8000–8999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNFC CNTRL CA
2011-07-25 415-266-9XXX 9000–9999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNFC CNTRL CA
2011-07-21 415-889-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 BELVEDERE CA
2011-07-21 415-926-5XXX 5000–5999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SNFC CNTRL CA
2011-07-20 415-523-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNFC CNTRL CA
2011-07-20 415-523-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNFC CNTRL CA
2011-07-20 415-523-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNFC CNTRL CA
2011-07-20 415-523-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNFC CNTRL CA
2011-07-20 415-523-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNFC CNTRL CA
2011-07-20 415-523-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNFC CNTRL CA
2011-07-20 415-523-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNFC CNTRL CA
2011-07-20 415-523-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C SNFC CNTRL CA
2011-07-20 415-906-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNFC CNTRL CA
2011-07-20 415-906-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNFC CNTRL CA
2011-07-18 415-886-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E CORTEMADRA CA
2011-07-18 415-886-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E CORTEMADRA CA
2011-07-18 415-891-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E CORTEMADRA CA
2011-07-18 415-891-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E CORTEMADRA CA
2011-07-18 415-900-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E BELVEDERE CA
2011-07-14 415-866-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNFC CNTRL CA
2011-07-14 415-926-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNFC CNTRL CA
2011-07-14 415-926-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNFC CNTRL CA
2011-07-14 415-926-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNFC CNTRL CA
2011-07-14 415-967-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC CNTRL CA
2011-07-14 415-967-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C SNFC CNTRL CA
2011-07-14 415-967-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC CNTRL CA
2011-07-13 415-465-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SAUSALITO CA
2011-07-13 415-900-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 BELVEDERE CA
2011-07-13 415-900-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 BELVEDERE CA
2011-07-13 415-967-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SNFC CNTRL CA
2011-07-13 415-967-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SNFC CNTRL CA
2011-07-06 415-656-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC JUNPR CA
2011-07-06 415-656-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC JUNPR CA
2011-07-06 415-747-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SAN RAFAEL CA
2011-07-06 415-747-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SAN RAFAEL CA
2011-07-06 415-747-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SAN RAFAEL CA
2011-06-29 415-758-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E CORTEMADRA CA
2011-06-29 415-758-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E CORTEMADRA CA
2011-06-29 415-758-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E CORTEMADRA CA
2011-06-29 415-758-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E CORTEMADRA CA
2011-06-29 415-900-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E BELVEDERE CA
2011-06-29 415-952-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E STNSN-BLNS CA
2011-06-29 415-952-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E STNSN-BLNS CA
2011-06-29 415-952-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E STNSN-BLNS CA
2011-06-29 415-952-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E STNSN-BLNS CA

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/21/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.