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
2011-06-29 415-952-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E STNSN-BLNS CA
2011-06-29 415-952-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E STNSN-BLNS CA
2011-06-29 415-952-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E STNSN-BLNS CA
2011-06-27 415-900-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E BELVEDERE CA
2011-06-16 415-306-7XXX 7000–7999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SAN RAFAEL CA
2011-06-14 415-523-8XXX 8000–8999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SNFC CNTRL CA
2011-06-14 415-523-9XXX 9000–9999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SNFC CNTRL CA
2011-06-10 415-926-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2011-06-10 415-940-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C SNFC CNTRL CA
2011-06-09 415-797-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E BELVEDERE CA
2011-06-07 415-797-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E BELVEDERE CA
2011-06-07 415-858-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E NOVATO CA
2011-06-06 415-940-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2011-06-06 415-940-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2011-06-06 415-940-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2011-06-06 415-940-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2011-05-25 415-299-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SAN RAFAEL CA
2011-05-24 415-571-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC MT-EV CA
2011-05-24 415-592-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC MT-EV CA
2011-05-20 415-758-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 CORTEMADRA CA
2011-05-20 415-900-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 BELVEDERE CA
2011-05-11 415-866-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNFC CNTRL CA
2011-05-11 415-866-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNFC CNTRL CA
2011-05-11 415-866-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNFC CNTRL CA
2011-05-11 415-866-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNFC CNTRL CA
2011-05-11 415-866-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNFC CNTRL CA
2011-05-11 415-866-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNFC CNTRL CA
2011-05-11 415-866-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNFC CNTRL CA
2011-05-11 415-866-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNFC CNTRL CA
2011-05-11 415-866-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNFC CNTRL CA
2011-05-11 415-940-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2011-05-11 415-940-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2011-05-11 415-940-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2011-05-11 415-940-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2011-05-11 415-940-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2011-05-10 415-967-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNFC CNTRL CA
2011-05-10 415-967-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNFC CNTRL CA
2011-05-10 415-967-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNFC CNTRL CA
2011-05-10 415-967-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNFC CNTRL CA
2011-05-09 415-858-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 NOVATO CA
2011-05-04 415-548-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 CORTEMADRA CA
2011-05-04 415-592-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC MT-EV CA
2011-05-04 415-857-9XXX 9000–9999Assigned ONVOY, LLC - CA 649C SNFC CNTRL CA
2011-05-04 415-862-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C STNSN-BLNS CA
2011-05-04 415-873-6XXX 6000–6999Assigned AT&T ENTERPRISES, LLC 516C POINTREYES CA
2011-05-04 415-900-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C BELVEDERE CA
2011-05-04 415-968-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 MILLVALLEY CA
2011-05-03 415-857-6XXX 6000–6999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNFC CNTRL CA
2011-05-03 415-857-8XXX 8000–8999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNFC CNTRL CA
2011-04-28 415-857-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNFC CNTRL 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.