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
2014-02-25 415-634-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E MILLVALLEY CA
2014-02-25 415-662-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E NICASIO CA
2014-02-25 415-741-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNFC MT-EV CA
2014-02-25 415-742-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNFC MT-EV CA
2014-02-25 415-997-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E NICASIO CA
2014-02-17 415-712-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 BELVEDERE CA
2014-02-14 415-231-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C SNFC MT-EV CA
2014-02-14 415-469-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C SNFC JUNPR CA
2014-02-14 415-930-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C SNFC CNTRL CA
2014-02-12 415-416-3XXX 3000–3999Assigned PAETEC ITEL, LLC 829J SNFC CNTRL CA
2014-02-12 415-761-9XXX 9000–9999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L NOVATO CA
2014-02-05 415-780-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC CNTRL CA
2014-02-05 415-805-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC CNTRL CA
2014-01-24 415-780-0XXX 0000–0999Assigned SONIC TELECOM, LLC - CA 433E SNFC CNTRL CA
2014-01-24 415-780-1XXX 1000–1999Assigned SONIC TELECOM, LLC - CA 433E SNFC CNTRL CA
2014-01-24 415-780-3XXX 3000–3999Assigned SONIC TELECOM, LLC - CA 433E SNFC CNTRL CA
2014-01-24 415-780-4XXX 4000–4999Assigned SONIC TELECOM, LLC - CA 433E SNFC CNTRL CA
2014-01-24 415-780-5XXX 5000–5999Assigned SONIC TELECOM, LLC - CA 433E SNFC CNTRL CA
2014-01-21 415-465-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SAUSALITO CA
2014-01-16 415-780-8XXX 8000–8999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 SNFC CNTRL CA
2014-01-14 415-805-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC CNTRL CA
2014-01-14 415-805-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC CNTRL CA
2014-01-10 415-805-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNFC CNTRL CA
2014-01-10 415-805-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNFC CNTRL CA
2014-01-10 415-805-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNFC CNTRL CA
2014-01-10 415-805-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNFC CNTRL CA
2014-01-09 415-688-3XXX 3000–3999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SNFC MT-EV CA
2014-01-08 415-870-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SAN RAFAEL CA
2014-01-06 415-582-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC JUNPR CA
2014-01-06 415-805-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC CNTRL CA
2014-01-06 415-805-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC CNTRL CA
2013-12-27 415-688-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC MT-EV CA
2013-12-13 415-930-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC CNTRL CA
2013-12-12 415-416-6XXX 6000–6999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SNFC CNTRL CA
2013-12-05 415-202-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC CNTRL CA
2013-12-05 415-403-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC CNTRL CA
2013-12-04 415-521-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SAN RAFAEL CA
2013-12-02 415-780-6XXX 6000–6999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNFC CNTRL CA
2013-12-02 415-780-7XXX 7000–7999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNFC CNTRL CA
2013-11-27 415-688-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC MT-EV CA
2013-11-22 415-805-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7240 SNFC CNTRL CA
2013-11-20 415-416-1XXX 1000–1999Assigned WIDE VOICE, LLC - CA 252F SNFC CNTRL CA
2013-11-20 415-780-2XXX 2000–2999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SNFC CNTRL CA
2013-11-12 415-688-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC MT-EV CA
2013-11-07 415-660-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2013-11-07 415-660-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2013-11-06 415-324-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 SAUSALITO CA
2013-11-06 415-463-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC MT-EV CA
2013-11-04 415-463-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C SNFC MT-EV CA
2013-11-04 415-463-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C 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.