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
2014-04-04 415-801-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC CNTRL CA
2014-04-04 415-801-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC CNTRL CA
2014-04-04 415-801-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC CNTRL CA
2014-04-04 415-801-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC CNTRL CA
2014-04-01 415-770-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNFC MT-EV CA
2014-04-01 415-770-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNFC MT-EV CA
2014-04-01 415-770-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNFC MT-EV CA
2014-04-01 415-770-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNFC MT-EV CA
2014-04-01 415-770-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNFC MT-EV CA
2014-04-01 415-770-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNFC MT-EV CA
2014-03-24 415-416-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2014-03-24 415-416-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2014-03-24 415-416-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2014-03-24 415-416-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2014-03-24 415-416-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2014-03-24 415-770-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC MT-EV CA
2014-03-18 415-316-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 BELVEDERE CA
2014-03-18 415-712-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 BELVEDERE CA
2014-03-17 415-870-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SAN RAFAEL CA
2014-03-17 415-870-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SAN RAFAEL CA
2014-03-17 415-870-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SAN RAFAEL CA
2014-03-14 415-548-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C CORTEMADRA CA
2014-03-14 415-548-9XXX 9000–9999Assigned ONVOY, LLC - CA 649C CORTEMADRA CA
2014-03-14 415-930-7XXX 7000–7999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNFC CNTRL CA
2014-03-14 415-930-8XXX 8000–8999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNFC CNTRL CA
2014-03-12 415-770-6XXX 6000–6999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J SNFC MT-EV CA
2014-03-11 415-612-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 IGNACIO CA
2014-03-11 415-870-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SAN RAFAEL CA
2014-03-06 415-930-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC CNTRL CA
2014-03-05 415-770-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC MT-EV CA
2014-02-28 415-496-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J CORTEMADRA CA
2014-02-28 415-761-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J NOVATO CA
2014-02-28 415-770-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNFC MT-EV CA
2014-02-28 415-877-2XXX 2000–2999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J MILLVALLEY CA
2014-02-26 415-371-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2014-02-26 415-481-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC JUNPR CA
2014-02-26 415-537-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2014-02-26 415-565-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2014-02-26 415-582-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC JUNPR CA
2014-02-26 415-582-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC JUNPR CA
2014-02-26 415-622-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2014-02-26 415-930-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2014-02-26 415-930-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2014-02-26 415-930-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2014-02-26 415-930-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2014-02-25 415-231-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNFC MT-EV CA
2014-02-25 415-286-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNFC MT-EV CA
2014-02-25 415-384-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E MILLVALLEY CA
2014-02-25 415-569-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E MILLVALLEY CA
2014-02-25 415-569-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E MILLVALLEY 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.