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
2013-02-18 415-521-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SAN RAFAEL CA
2013-02-15 415-988-7XXX 7000–7999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SNFC JUNPR CA
2013-02-04 415-696-5XXX 5000–5999Assigned PAETEC ITEL, LLC 829J SNFC CNTRL CA
2013-01-31 415-589-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7240 SNFC CNTRL CA
2013-01-31 415-589-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7240 SNFC CNTRL CA
2013-01-31 415-589-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7240 SNFC CNTRL CA
2013-01-30 415-696-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SNFC CNTRL CA
2013-01-29 415-589-7XXX 7000–7999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SNFC CNTRL CA
2013-01-29 415-635-1XXX 1000–1999Assigned METROPCS, INC. 5562 SNFC CNTRL CA
2013-01-29 415-635-8XXX 8000–8999Assigned METROPCS, INC. 5562 SNFC CNTRL CA
2013-01-29 415-635-9XXX 9000–9999Assigned METROPCS, INC. 5562 SNFC CNTRL CA
2013-01-16 415-589-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7240 SNFC CNTRL CA
2013-01-16 415-589-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7240 SNFC CNTRL CA
2013-01-16 415-688-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC MT-EV CA
2013-01-16 415-696-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SNFC CNTRL CA
2013-01-08 415-726-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SAN RAFAEL CA
2013-01-07 415-528-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC JUNPR CA
2013-01-07 415-528-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC JUNPR CA
2012-12-31 415-908-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C SNFC CNTRL CA
2012-12-31 415-921-9XXX 9000–9999Assigned ONVOY, LLC - CA 649C SNFC CNTRL CA
2012-12-19 415-763-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E IGNACIO CA
2012-12-19 415-763-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E IGNACIO CA
2012-12-18 415-275-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C SAUSALITO CA
2012-12-18 415-360-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C MILLVALLEY CA
2012-12-18 415-488-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C SAN RAFAEL CA
2012-12-18 415-630-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C NICASIO CA
2012-12-18 415-779-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C STNSN-BLNS CA
2012-12-18 415-840-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC JUNPR CA
2012-12-18 415-895-9XXX 9000–9999Assigned ONVOY, LLC - CA 649C NOVATO CA
2012-12-18 415-938-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C POINTREYES CA
2012-12-17 415-236-9XXX 9000–9999Assigned ONVOY, LLC - CA 649C INVERNESS CA
2012-12-17 415-691-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C BELVEDERE CA
2012-12-17 415-763-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C IGNACIO CA
2012-12-17 415-886-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C CORTEMADRA CA
2012-12-14 415-749-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC CNTRL CA
2012-12-12 415-326-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C MILLVALLEY CA
2012-12-12 415-326-9XXX 9000–9999Assigned ONVOY, LLC - CA 649C MILLVALLEY CA
2012-12-12 415-753-9XXX 9000–9999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SNFC MT-EV CA
2012-12-12 415-923-8XXX 8000–8999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SNFC CNTRL CA
2012-12-10 415-636-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2012-12-10 415-636-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2012-12-10 415-636-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2012-12-10 415-688-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C SNFC MT-EV CA
2012-12-05 415-612-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C IGNACIO CA
2012-12-05 415-612-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C IGNACIO CA
2012-12-05 415-669-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C INVERNESS CA
2012-12-05 415-758-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C CORTEMADRA CA
2012-12-05 415-891-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C CORTEMADRA CA
2012-12-04 415-367-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C SAUSALITO CA
2012-12-04 415-367-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C SAUSALITO 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.