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
2011-08-23 415-470-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2011-08-23 415-470-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2011-08-23 415-470-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2011-08-23 415-470-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2011-08-22 415-340-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SNFC MT-EV CA
2011-08-18 415-361-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNFC CNTRL CA
2011-08-18 415-361-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNFC CNTRL CA
2011-08-18 415-361-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNFC CNTRL CA
2011-08-18 415-361-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNFC CNTRL CA
2011-08-18 415-384-8XXX 8000–8999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L MILLVALLEY CA
2011-08-18 415-466-6XXX 6000–6999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SNFC JUNPR CA
2011-08-18 415-937-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 BELVEDERE CA
2011-08-15 415-858-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 NOVATO CA
2011-08-11 415-906-8XXX 8000–8999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNFC CNTRL CA
2011-08-11 415-926-6XXX 6000–6999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNFC CNTRL CA
2011-08-09 415-316-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 BELVEDERE CA
2011-08-05 415-926-7XXX 7000–7999Assigned PAETEC ITEL, LLC 829J SNFC CNTRL CA
2011-08-04 415-340-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNFC MT-EV CA
2011-08-04 415-340-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNFC MT-EV CA
2011-08-04 415-340-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNFC MT-EV CA
2011-08-04 415-799-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 SNFC JUNPR CA
2011-08-02 415-326-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E MILLVALLEY CA
2011-08-02 415-450-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SAN RAFAEL CA
2011-08-02 415-462-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SAN RAFAEL CA
2011-08-02 415-472-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SAN RAFAEL CA
2011-08-02 415-612-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E IGNACIO CA
2011-08-02 415-612-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E IGNACIO CA
2011-08-02 415-649-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNFC MT-EV CA
2011-08-02 415-858-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E NOVATO CA
2011-08-02 415-887-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SAUSALITO CA
2011-08-02 415-887-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SAUSALITO CA
2011-08-02 415-890-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNFC JUNPR CA
2011-08-02 415-890-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNFC JUNPR CA
2011-08-02 415-890-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNFC JUNPR CA
2011-08-02 415-890-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNFC JUNPR CA
2011-08-02 415-890-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNFC JUNPR CA
2011-08-02 415-890-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNFC JUNPR CA
2011-08-02 415-906-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNFC CNTRL CA
2011-08-02 415-906-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNFC CNTRL CA
2011-08-02 415-906-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNFC CNTRL CA
2011-08-02 415-906-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNFC CNTRL CA
2011-08-02 415-906-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNFC CNTRL CA
2011-08-02 415-906-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNFC CNTRL CA
2011-08-02 415-938-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E POINTREYES CA
2011-08-02 415-938-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E POINTREYES CA
2011-08-02 415-938-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E POINTREYES CA
2011-07-28 415-237-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C INVERNESS CA
2011-07-28 415-669-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C INVERNESS CA
2011-07-25 415-266-1XXX 1000–1999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNFC CNTRL CA
2011-07-25 415-266-2XXX 2000–2999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SNFC CNTRL 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.