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
2014-05-27 415-660-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC CNTRL CA
2014-05-23 415-660-2XXX 2000–2999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNFC CNTRL CA
2014-05-23 415-660-3XXX 3000–3999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNFC CNTRL CA
2014-05-22 415-851-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNFC CNTRL CA
2014-05-22 415-851-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNFC CNTRL CA
2014-05-22 415-851-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNFC CNTRL CA
2014-05-22 415-851-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNFC CNTRL CA
2014-05-22 415-851-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNFC CNTRL CA
2014-05-22 415-851-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNFC CNTRL CA
2014-05-22 415-851-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNFC CNTRL CA
2014-05-22 415-851-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNFC CNTRL CA
2014-05-22 415-851-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNFC CNTRL CA
2014-05-22 415-851-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNFC CNTRL CA
2014-05-19 415-483-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E IGNACIO CA
2014-05-19 415-610-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNFC CNTRL CA
2014-05-19 415-610-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNFC CNTRL CA
2014-05-19 415-610-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNFC CNTRL CA
2014-05-19 415-610-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNFC CNTRL CA
2014-05-19 415-612-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E IGNACIO CA
2014-05-19 415-612-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E IGNACIO CA
2014-05-14 415-237-8XXX 8000–8999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J INVERNESS CA
2014-05-14 415-630-1XXX 1000–1999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J NICASIO CA
2014-05-14 415-842-6XXX 6000–6999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J IGNACIO CA
2014-05-14 415-938-0XXX 0000–0999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J POINTREYES CA
2014-05-13 415-862-6XXX 6000–6999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J STNSN-BLNS CA
2014-05-13 415-887-0XXX 0000–0999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J SAUSALITO CA
2014-05-01 415-801-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC CNTRL CA
2014-05-01 415-881-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 IGNACIO CA
2014-04-29 415-801-1XXX 1000–1999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SNFC CNTRL CA
2014-04-29 415-801-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SNFC CNTRL CA
2014-04-29 415-842-7XXX 7000–7999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L IGNACIO CA
2014-04-28 415-985-3XXX 3000–3999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J NOVATO CA
2014-04-25 415-797-6XXX 6000–6999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L BELVEDERE CA
2014-04-10 415-769-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C SNFC JUNPR CA
2014-04-10 415-801-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C SNFC CNTRL CA
2014-04-09 415-801-5XXX 5000–5999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SNFC CNTRL CA
2014-04-08 415-961-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2014-04-08 415-961-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2014-04-08 415-961-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2014-04-08 415-961-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2014-04-08 415-961-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2014-04-08 415-961-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2014-04-08 415-961-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2014-04-08 415-961-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2014-04-08 415-961-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2014-04-08 415-961-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2014-04-04 415-416-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2014-04-04 415-416-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2014-04-04 415-769-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C SNFC JUNPR CA
2014-04-04 415-801-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 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.