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
2006-05-05 415-728-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNFC CNTRL CA
2006-05-04 415-202-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 SNFC CNTRL CA
2006-05-02 415-704-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC JUNPR CA
2006-04-21 415-946-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SNFC CNTRL CA
2006-04-18 415-320-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 NOVATO CA
2006-04-18 415-320-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 NOVATO CA
2006-04-14 415-874-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC CNTRL CA
2006-04-11 415-324-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C SAUSALITO CA
2006-04-11 415-326-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C MILLVALLEY CA
2006-03-28 415-287-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC JUNPR CA
2006-03-24 415-592-1XXX 1000–1999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SNFC MT-EV CA
2006-03-24 415-592-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SNFC MT-EV CA
2006-03-21 415-671-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 SNFC CNTRL CA
2006-03-01 415-874-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC CNTRL CA
2006-02-28 415-644-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC CNTRL CA
2006-02-28 415-659-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC CNTRL CA
2006-02-28 415-670-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC CNTRL CA
2006-02-10 415-287-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C SNFC JUNPR CA
2006-02-08 415-599-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 NOVATO CA
2006-02-08 415-680-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC MT-EV CA
2006-02-08 415-680-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC MT-EV CA
2006-02-07 415-889-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 BELVEDERE CA
2006-02-03 415-287-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC JUNPR CA
2006-02-03 415-287-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC JUNPR CA
2006-02-01 415-789-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 BELVEDERE CA
2006-01-26 415-347-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C SNFC JUNPR CA
2006-01-24 415-306-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SAN RAFAEL CA
2006-01-24 415-306-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SAN RAFAEL CA
2006-01-24 415-306-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SAN RAFAEL CA
2006-01-24 415-615-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNFC CNTRL CA
2006-01-24 415-627-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNFC CNTRL CA
2006-01-24 415-627-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNFC CNTRL CA
2006-01-24 415-694-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNFC CNTRL CA
2006-01-24 415-694-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNFC CNTRL CA
2006-01-24 415-694-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNFC CNTRL CA
2006-01-24 415-694-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNFC CNTRL CA
2006-01-24 415-694-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNFC CNTRL CA
2006-01-24 415-694-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNFC CNTRL CA
2006-01-20 415-248-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 SNFC CNTRL CA
2006-01-11 415-694-5XXX 5000–5999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNFC CNTRL CA
2006-01-11 415-694-6XXX 6000–6999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNFC CNTRL CA
2006-01-11 415-694-7XXX 7000–7999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNFC CNTRL CA
2005-12-28 415-968-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 MILLVALLEY CA
2005-12-28 415-968-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 MILLVALLEY CA
2005-12-19 415-488-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SAN RAFAEL CA
2005-12-13 415-329-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C CORTEMADRA CA
2005-12-13 415-475-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C IGNACIO CA
2005-12-13 415-480-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C SAUSALITO CA
2005-12-13 415-599-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C NOVATO CA
2005-12-07 415-329-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 CORTEMADRA 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.