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
2013-06-28 415-636-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNFC CNTRL CA
2013-06-28 415-636-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNFC CNTRL CA
2013-06-28 415-636-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNFC CNTRL CA
2013-06-28 415-638-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2013-06-28 415-638-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2013-06-28 415-638-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2013-06-28 415-638-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2013-06-28 415-638-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNFC CNTRL CA
2013-06-28 415-802-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNFC CNTRL CA
2013-06-26 415-423-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2013-06-19 415-528-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC JUNPR CA
2013-06-19 415-798-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 NOVATO CA
2013-06-19 415-802-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC CNTRL CA
2013-06-19 415-802-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC CNTRL CA
2013-06-18 415-688-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SNFC MT-EV CA
2013-06-18 415-802-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 SNFC CNTRL CA
2013-06-12 415-528-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SNFC JUNPR CA
2013-06-10 415-802-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNFC CNTRL CA
2013-06-10 415-802-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNFC CNTRL CA
2013-06-10 415-802-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNFC CNTRL CA
2013-06-10 415-802-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNFC CNTRL CA
2013-06-10 415-802-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNFC CNTRL CA
2013-06-10 415-802-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNFC CNTRL CA
2013-06-05 415-423-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNFC CNTRL CA
2013-06-05 415-493-6XXX 6000–6999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L NOVATO CA
2013-06-05 415-766-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNFC CNTRL CA
2013-06-03 415-423-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC CNTRL CA
2013-06-03 415-423-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC CNTRL CA
2013-05-29 415-767-5XXX 5000–5999Assigned IP HORIZON LLC 515J SNFC CNTRL CA
2013-05-29 415-767-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 SNFC CNTRL CA
2013-05-29 415-767-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SNFC CNTRL CA
2013-05-29 415-767-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SNFC CNTRL CA
2013-05-28 415-231-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC MT-EV CA
2013-05-28 415-231-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC MT-EV CA
2013-05-28 415-481-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC JUNPR CA
2013-05-28 415-521-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J SAN RAFAEL CA
2013-05-28 415-767-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC CNTRL CA
2013-05-23 415-767-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J SNFC CNTRL CA
2013-05-22 415-548-6XXX 6000–6999Assigned PAETEC ITEL, LLC 829J CORTEMADRA CA
2013-05-22 415-549-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC CNTRL CA
2013-05-22 415-767-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC CNTRL CA
2013-05-15 415-423-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC CNTRL CA
2013-05-14 415-712-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E BELVEDERE CA
2013-05-14 415-712-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E BELVEDERE CA
2013-05-14 415-712-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E BELVEDERE CA
2013-05-13 415-231-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC MT-EV CA
2013-05-13 415-231-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SNFC MT-EV CA
2013-05-10 415-549-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C SNFC CNTRL CA
2013-05-10 415-549-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C SNFC CNTRL CA
2013-05-10 415-688-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C SNFC MT-EV 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.