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
2015-07-07 415-761-6XXX 6000–6999Assigned PAETEC ITEL, LLC 829J NOVATO CA
2015-07-01 415-212-4XXX 4000–4999Assigned TWILIO INTERNATIONAL, INC. 506J SNFC CNTRL CA
2015-07-01 415-212-5XXX 5000–5999Assigned TWILIO INTERNATIONAL, INC. 506J SNFC CNTRL CA
2015-07-01 415-212-6XXX 6000–6999Assigned TWILIO INTERNATIONAL, INC. 506J SNFC CNTRL CA
2015-07-01 415-212-7XXX 7000–7999Assigned TWILIO INTERNATIONAL, INC. 506J SNFC CNTRL CA
2015-07-01 415-214-8XXX 8000–8999Assigned TWILIO INTERNATIONAL, INC. 506J SNFC CNTRL CA
2015-07-01 415-214-9XXX 9000–9999Assigned TWILIO INTERNATIONAL, INC. 506J SNFC CNTRL CA
2015-07-01 415-914-1XXX 1000–1999Assigned TWILIO INTERNATIONAL, INC. 506J SNFC CNTRL CA
2015-07-01 415-914-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C SNFC CNTRL CA
2015-07-01 415-914-7XXX 7000–7999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SNFC CNTRL CA
2015-07-01 415-914-8XXX 8000–8999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SNFC CNTRL CA
2015-07-01 415-914-9XXX 9000–9999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SNFC CNTRL CA
2015-07-01 415-980-1XXX 1000–1999Assigned TWILIO INTERNATIONAL, INC. 506J SNFC JUNPR CA
2015-07-01 415-980-2XXX 2000–2999Assigned TWILIO INTERNATIONAL, INC. 506J SNFC JUNPR CA
2015-07-01 415-980-3XXX 3000–3999Assigned TWILIO INTERNATIONAL, INC. 506J SNFC JUNPR CA
2015-07-01 415-980-4XXX 4000–4999Assigned TWILIO INTERNATIONAL, INC. 506J SNFC JUNPR CA
2015-07-01 415-980-5XXX 5000–5999Assigned TWILIO INTERNATIONAL, INC. 506J SNFC JUNPR CA
2015-07-01 415-996-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 IGNACIO CA
2015-07-01 415-996-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 IGNACIO CA
2015-06-30 415-849-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 CORTEMADRA CA
2015-06-29 415-214-7XXX 7000–7999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNFC CNTRL CA
2015-06-17 415-942-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 SAUSALITO CA
2015-06-11 415-914-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2015-06-11 415-914-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2015-06-11 415-914-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2015-06-09 415-650-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC MT-EV CA
2015-06-09 415-650-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC MT-EV CA
2015-06-09 415-903-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E POINTREYES CA
2015-06-04 415-855-8XXX 8000–8999Assigned PAETEC ITEL, LLC 829J SAUSALITO CA
2015-06-04 415-914-0XXX 0000–0999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SNFC CNTRL CA
2015-06-03 415-849-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E CORTEMADRA CA
2015-06-03 415-936-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C CORTEMADRA CA
2015-06-03 415-936-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C CORTEMADRA CA
2015-06-03 415-991-5XXX 5000–5999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SAN RAFAEL CA
2015-06-02 415-650-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C SNFC MT-EV CA
2015-06-02 415-650-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C SNFC MT-EV CA
2015-05-29 415-914-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC CNTRL CA
2015-05-19 415-417-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C SNFC CNTRL CA
2015-05-19 415-417-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C SNFC CNTRL CA
2015-05-19 415-417-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C SNFC CNTRL CA
2015-05-19 415-417-3XXX 3000–3999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNFC CNTRL CA
2015-05-19 415-910-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BELVEDERE CA
2015-05-14 415-988-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC JUNPR CA
2015-05-13 415-650-3XXX 3000–3999Assigned AT&T ENTERPRISES, LLC 516C SNFC MT-EV CA
2015-05-08 415-417-5XXX 5000–5999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SNFC CNTRL CA
2015-05-04 415-910-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 BELVEDERE CA
2015-05-04 415-910-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 BELVEDERE CA
2015-05-04 415-910-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 BELVEDERE CA
2015-04-28 415-301-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 NOVATO CA
2015-04-20 415-604-5XXX 5000–5999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SNFC JUNPR 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.