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
2013-09-13 415-653-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2013-09-13 415-653-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2013-09-13 415-696-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2013-09-13 415-696-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2013-09-13 415-757-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2013-09-13 415-757-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2013-09-13 415-757-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2013-09-10 415-521-5XXX 5000–5999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SAN RAFAEL CA
2013-09-09 415-275-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SAUSALITO CA
2013-09-06 415-463-5XXX 5000–5999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SNFC MT-EV CA
2013-09-05 415-653-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC CNTRL CA
2013-09-05 415-653-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC CNTRL CA
2013-09-04 415-737-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 CORTEMADRA CA
2013-08-29 415-653-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7240 SNFC CNTRL CA
2013-08-23 415-712-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 BELVEDERE CA
2013-08-22 415-521-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C SAN RAFAEL CA
2013-08-22 415-712-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C BELVEDERE CA
2013-08-22 415-761-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C NOVATO CA
2013-08-22 415-787-9XXX 9000–9999Assigned ONVOY, LLC - CA 649C POINTREYES CA
2013-08-22 415-968-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C MILLVALLEY CA
2013-08-21 415-481-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 SNFC JUNPR CA
2013-08-20 415-653-4XXX 4000–4999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNFC CNTRL CA
2013-08-20 415-653-5XXX 5000–5999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNFC CNTRL CA
2013-08-14 415-653-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C SNFC CNTRL CA
2013-08-14 415-653-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C SNFC CNTRL CA
2013-08-12 415-638-6XXX 6000–6999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SNFC CNTRL CA
2013-08-09 415-741-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNFC MT-EV CA
2013-08-09 415-741-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNFC MT-EV CA
2013-08-09 415-741-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNFC MT-EV CA
2013-08-09 415-741-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNFC MT-EV CA
2013-08-08 415-653-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNFC CNTRL CA
2013-08-07 415-761-8XXX 8000–8999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J NOVATO CA
2013-08-06 415-696-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNFC CNTRL CA
2013-08-06 415-696-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNFC CNTRL CA
2013-08-06 415-696-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNFC CNTRL CA
2013-08-06 415-696-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNFC CNTRL CA
2013-08-01 415-299-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SAN RAFAEL CA
2013-07-31 415-481-4XXX 4000–4999Assigned TWILIO INTERNATIONAL, INC. 506J SNFC JUNPR CA
2013-07-30 415-727-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E INVERNESS CA
2013-07-25 415-825-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC JUNPR CA
2013-07-22 415-528-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SNFC JUNPR CA
2013-07-22 415-638-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 SNFC CNTRL CA
2013-07-17 415-757-0XXX 0000–0999Assigned AT&T ENTERPRISES, LLC 516C SNFC CNTRL CA
2013-07-17 415-761-5XXX 5000–5999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L NOVATO CA
2013-07-10 415-481-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC JUNPR CA
2013-07-08 415-798-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 NOVATO CA
2013-07-03 415-638-4XXX 4000–4999Assigned PAETEC ITEL, LLC 829J SNFC CNTRL CA
2013-07-03 415-638-8XXX 8000–8999Assigned PAETEC ITEL, LLC 829J SNFC CNTRL CA
2013-07-01 415-481-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 SNFC JUNPR CA
2013-06-28 415-636-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E 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.