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
2007-04-13 415-972-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SNFC CNTRL CA
2007-04-10 415-715-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C SNFC JUNPR CA
2007-04-10 415-876-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C SNFC MT-EV CA
2007-04-06 415-367-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SAUSALITO CA
2007-04-06 415-737-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 CORTEMADRA CA
2007-04-06 415-889-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 BELVEDERE CA
2007-04-05 415-888-8XXX 8000–8999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L MILLVALLEY CA
2007-03-30 415-684-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C SNFC CNTRL CA
2007-03-20 415-322-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 MILLVALLEY CA
2007-03-20 415-360-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 MILLVALLEY CA
2007-03-14 415-493-0XXX 0000–0999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 NOVATO CA
2007-03-14 415-670-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 SNFC CNTRL CA
2007-03-14 415-889-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 BELVEDERE CA
2007-03-01 415-747-8XXX 8000–8999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SAN RAFAEL CA
2007-02-14 415-532-4XXX 4000–4999Assigned METROPCS, INC. 5562 SAN RAFAEL CA
2007-02-14 415-798-5XXX 5000–5999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J NOVATO CA
2007-01-31 415-871-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SNFC CNTRL CA
2007-01-31 415-963-0XXX 0000–0999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SNFC CNTRL CA
2007-01-31 415-963-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SNFC CNTRL CA
2007-01-31 415-970-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SNFC CNTRL CA
2007-01-25 415-655-4XXX 4000–4999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNFC CNTRL CA
2007-01-25 415-655-5XXX 5000–5999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNFC CNTRL CA
2007-01-25 415-655-6XXX 6000–6999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNFC CNTRL CA
2007-01-25 415-655-7XXX 7000–7999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNFC CNTRL CA
2007-01-25 415-655-8XXX 8000–8999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNFC CNTRL CA
2007-01-25 415-895-1XXX 1000–1999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L NOVATO CA
2007-01-22 415-874-9XXX 9000–9999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SNFC CNTRL CA
2007-01-22 415-875-9XXX 9000–9999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SNFC CNTRL CA
2007-01-18 415-704-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C SNFC JUNPR CA
2007-01-18 415-875-7XXX 7000–7999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNFC CNTRL CA
2007-01-16 415-306-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SAN RAFAEL CA
2007-01-16 415-306-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SAN RAFAEL CA
2007-01-16 415-418-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC MT-EV CA
2007-01-16 415-418-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C SNFC MT-EV CA
2007-01-16 415-444-9XXX 9000–9999Assigned ONVOY, LLC - CA 649C SAN RAFAEL CA
2007-01-16 415-466-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C SNFC JUNPR CA
2007-01-16 415-728-9XXX 9000–9999Assigned ONVOY, LLC - CA 649C SNFC CNTRL CA
2006-12-19 415-655-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C SNFC CNTRL CA
2006-11-22 415-251-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C IGNACIO CA
2006-11-22 415-251-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C IGNACIO CA
2006-11-22 415-251-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C IGNACIO CA
2006-11-22 415-251-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C IGNACIO CA
2006-11-22 415-251-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C IGNACIO CA
2006-11-22 415-251-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C IGNACIO CA
2006-11-22 415-251-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C IGNACIO CA
2006-11-22 415-251-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C IGNACIO CA
2006-11-22 415-251-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C IGNACIO CA
2006-11-22 415-251-9XXX 9000–9999Assigned ONVOY, LLC - CA 649C IGNACIO CA
2006-11-22 415-948-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SNFC CNTRL CA
2006-11-22 415-983-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SNFC CNTRL 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.