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
Clear Download CSV ↓
Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2010-08-02 415-236-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E INVERNESS CA
2010-08-02 415-322-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E MILLVALLEY CA
2010-07-30 415-889-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E BELVEDERE CA
2010-07-27 415-659-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC CNTRL CA
2010-07-20 415-878-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C NOVATO CA
2010-07-19 415-273-0XXX 0000–0999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SNFC CNTRL CA
2010-07-16 415-747-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SAN RAFAEL CA
2010-07-16 415-878-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E NOVATO CA
2010-07-12 415-745-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC MT-EV CA
2010-07-08 415-444-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SAN RAFAEL CA
2010-07-08 415-625-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC CNTRL CA
2010-06-29 415-300-8XXX 8000–8999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SAN RAFAEL CA
2010-06-29 415-300-9XXX 9000–9999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SAN RAFAEL CA
2010-06-29 415-785-0XXX 0000–0999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SAN RAFAEL CA
2010-06-29 415-785-5XXX 5000–5999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SAN RAFAEL CA
2010-06-29 415-785-6XXX 6000–6999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SAN RAFAEL CA
2010-06-29 415-785-9XXX 9000–9999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SAN RAFAEL CA
2010-06-23 415-226-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SAN RAFAEL CA
2010-06-22 415-689-2XXX 2000–2999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SNFC MT-EV CA
2010-06-18 415-735-9XXX 9000–9999Assigned ONVOY, LLC - CA 649C SNFC CNTRL CA
2010-06-04 415-404-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC JUNPR CA
2010-05-26 415-226-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SAN RAFAEL CA
2010-05-26 415-800-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SNFC CNTRL CA
2010-05-26 415-800-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SNFC CNTRL CA
2010-05-25 415-689-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNFC MT-EV CA
2010-05-25 415-689-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNFC MT-EV CA
2010-05-25 415-799-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNFC JUNPR CA
2010-05-25 415-799-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNFC JUNPR CA
2010-05-25 415-799-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNFC JUNPR CA
2010-05-25 415-800-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNFC CNTRL CA
2010-05-25 415-800-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNFC CNTRL CA
2010-05-25 415-800-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNFC CNTRL CA
2010-05-25 415-800-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNFC CNTRL CA
2010-05-24 415-625-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC CNTRL CA
2010-05-13 415-691-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 BELVEDERE CA
2010-05-10 415-488-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SAN RAFAEL CA
2010-05-10 415-578-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SAN RAFAEL CA
2010-05-10 415-689-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC MT-EV CA
2010-04-27 415-975-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C SNFC CNTRL CA
2010-04-19 415-464-6XXX 6000–6999Assigned PAETEC ITEL, LLC 829J SAN RAFAEL CA
2010-04-19 415-800-0XXX 0000–0999Assigned PAETEC ITEL, LLC 829J SNFC CNTRL CA
2010-04-14 415-234-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C IGNACIO CA
2010-04-13 415-888-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 MILLVALLEY CA
2010-04-07 415-800-7XXX 7000–7999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SNFC CNTRL CA
2010-04-07 415-800-8XXX 8000–8999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SNFC CNTRL CA
2010-04-05 415-574-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNFC MT-EV CA
2010-03-23 415-891-3XXX 3000–3999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L CORTEMADRA CA
2010-03-08 415-384-6XXX 6000–6999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F MILLVALLEY CA
2010-03-08 415-582-5XXX 5000–5999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SNFC JUNPR CA
2010-03-08 415-624-8XXX 8000–8999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J 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.