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
2013-11-04 415-548-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C CORTEMADRA CA
2013-11-04 415-548-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C CORTEMADRA CA
2013-11-01 415-324-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C SAUSALITO CA
2013-11-01 415-324-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C SAUSALITO CA
2013-10-31 415-842-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C IGNACIO CA
2013-10-31 415-862-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C STNSN-BLNS CA
2013-10-31 415-862-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C STNSN-BLNS CA
2013-10-31 415-881-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C IGNACIO CA
2013-10-30 415-712-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 BELVEDERE CA
2013-10-30 415-712-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 BELVEDERE CA
2013-10-18 415-660-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SNFC CNTRL CA
2013-10-18 415-660-5XXX 5000–5999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SNFC CNTRL CA
2013-10-17 415-660-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC CNTRL CA
2013-10-11 415-968-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 MILLVALLEY CA
2013-10-07 415-726-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SAN RAFAEL CA
2013-10-03 415-660-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2013-10-01 415-481-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNFC JUNPR CA
2013-10-01 415-521-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SAN RAFAEL CA
2013-10-01 415-656-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNFC JUNPR CA
2013-10-01 415-715-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNFC JUNPR CA
2013-10-01 415-779-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E STNSN-BLNS CA
2013-10-01 415-799-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNFC JUNPR CA
2013-10-01 415-841-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNFC JUNPR CA
2013-10-01 415-841-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNFC JUNPR CA
2013-10-01 415-862-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E STNSN-BLNS CA
2013-10-01 415-862-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E STNSN-BLNS CA
2013-09-27 415-610-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2013-09-27 415-610-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2013-09-27 415-610-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2013-09-27 415-610-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2013-09-26 415-535-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2013-09-26 415-535-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2013-09-26 415-610-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 SNFC CNTRL CA
2013-09-26 415-610-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SNFC CNTRL CA
2013-09-26 415-635-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2013-09-26 415-635-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2013-09-26 415-635-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2013-09-25 415-521-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SAN RAFAEL CA
2013-09-25 415-521-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SAN RAFAEL CA
2013-09-25 415-988-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNFC JUNPR CA
2013-09-25 415-988-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNFC JUNPR CA
2013-09-25 415-988-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNFC JUNPR CA
2013-09-25 415-988-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNFC JUNPR CA
2013-09-23 415-712-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 BELVEDERE CA
2013-09-23 415-988-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 SNFC JUNPR CA
2013-09-20 415-688-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 SNFC MT-EV CA
2013-09-20 415-825-5XXX 5000–5999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SNFC JUNPR CA
2013-09-19 415-569-4XXX 4000–4999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L MILLVALLEY CA
2013-09-19 415-886-8XXX 8000–8999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L CORTEMADRA CA
2013-09-17 415-747-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SAN RAFAEL 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.