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
2014-08-11 415-915-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNFC CNTRL CA
2014-08-11 415-915-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNFC CNTRL CA
2014-08-11 415-943-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E STNSN-BLNS CA
2014-08-11 415-943-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E STNSN-BLNS CA
2014-08-11 415-943-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E STNSN-BLNS CA
2014-08-11 415-943-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E STNSN-BLNS CA
2014-08-08 415-964-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNFC MT-EV CA
2014-08-08 415-964-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNFC MT-EV CA
2014-08-08 415-964-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNFC MT-EV CA
2014-08-08 415-964-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNFC MT-EV CA
2014-08-08 415-964-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNFC MT-EV CA
2014-08-08 415-964-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNFC MT-EV CA
2014-08-06 415-769-4XXX 4000–4999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SNFC JUNPR CA
2014-08-06 415-779-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E STNSN-BLNS CA
2014-08-06 415-787-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E POINTREYES CA
2014-08-06 415-864-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNFC CNTRL CA
2014-08-06 415-873-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E POINTREYES CA
2014-08-06 415-891-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E CORTEMADRA CA
2014-08-06 415-891-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E CORTEMADRA CA
2014-08-06 415-938-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E POINTREYES CA
2014-08-06 415-969-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNFC CNTRL CA
2014-08-06 415-969-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNFC CNTRL CA
2014-08-06 415-985-0XXX 0000–0999Assigned TWILIO INTERNATIONAL, INC. 506J NOVATO CA
2014-08-06 415-985-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E NOVATO CA
2014-08-06 415-985-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E NOVATO CA
2014-08-06 415-991-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SAN RAFAEL CA
2014-08-06 415-991-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SAN RAFAEL CA
2014-08-06 415-991-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SAN RAFAEL CA
2014-07-31 415-872-8XXX 8000–8999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J SNFC CNTRL CA
2014-07-30 415-726-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SAN RAFAEL CA
2014-07-28 415-915-1XXX 1000–1999Assigned PAETEC ITEL, LLC 829J SNFC CNTRL CA
2014-07-24 415-598-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E NICASIO CA
2014-07-24 415-598-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E NICASIO CA
2014-07-24 415-842-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E IGNACIO CA
2014-07-24 415-842-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E IGNACIO CA
2014-07-24 415-842-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E IGNACIO CA
2014-07-24 415-879-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E MILLVALLEY CA
2014-07-24 415-879-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E MILLVALLEY CA
2014-07-24 415-968-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E MILLVALLEY CA
2014-07-24 415-968-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E MILLVALLEY CA
2014-07-24 415-985-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 NOVATO CA
2014-07-24 415-997-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E NICASIO CA
2014-07-23 415-985-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 NOVATO CA
2014-07-22 415-769-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC JUNPR CA
2014-07-21 415-960-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 BELVEDERE CA
2014-07-21 415-960-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 BELVEDERE CA
2014-07-21 415-960-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 BELVEDERE CA
2014-07-17 415-769-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 SNFC JUNPR CA
2014-07-17 415-769-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 SNFC JUNPR CA
2014-07-17 415-941-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SNFC MT-EV 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.