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
2015-09-16 415-919-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNFC CNTRL CA
2015-09-16 415-919-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNFC CNTRL CA
2015-09-16 415-919-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNFC CNTRL CA
2015-09-16 415-942-7XXX 7000–7999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SAUSALITO CA
2015-09-16 415-996-2XXX 2000–2999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J IGNACIO CA
2015-09-11 415-909-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C SNFC JUNPR CA
2015-09-11 415-916-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2015-09-11 415-916-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2015-09-11 415-916-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2015-09-11 415-916-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2015-09-10 415-619-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C BELVEDERE CA
2015-09-10 415-619-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C BELVEDERE CA
2015-09-08 415-818-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNFC JUNPR CA
2015-09-08 415-818-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNFC JUNPR CA
2015-09-08 415-818-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNFC JUNPR CA
2015-09-08 415-818-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNFC JUNPR CA
2015-09-08 415-818-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNFC JUNPR CA
2015-09-08 415-818-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNFC JUNPR CA
2015-09-08 415-996-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 IGNACIO CA
2015-09-03 415-319-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNFC MT-EV CA
2015-09-03 415-319-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNFC MT-EV CA
2015-09-03 415-319-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNFC MT-EV CA
2015-08-26 415-301-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 NOVATO CA
2015-08-21 415-949-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 NICASIO CA
2015-08-12 415-301-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 NOVATO CA
2015-08-12 415-991-8XXX 8000–8999Assigned TWILIO INTERNATIONAL, INC. 506J SAN RAFAEL CA
2015-08-11 415-301-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 NOVATO CA
2015-08-11 415-360-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MILLVALLEY CA
2015-08-03 415-619-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 BELVEDERE CA
2015-07-30 415-910-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 BELVEDERE CA
2015-07-30 415-910-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 BELVEDERE CA
2015-07-30 415-910-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 BELVEDERE CA
2015-07-30 415-910-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 BELVEDERE CA
2015-07-30 415-910-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 BELVEDERE CA
2015-07-30 415-910-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 BELVEDERE CA
2015-07-24 415-985-9XXX 9000–9999Assigned IP HORIZON LLC 515J NOVATO CA
2015-07-23 415-278-3XXX 3000–3999Assigned METROPCS, INC. 5562 SNFC CNTRL CA
2015-07-23 415-434-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SNFC CNTRL CA
2015-07-16 415-636-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC CNTRL CA
2015-07-16 415-646-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2015-07-16 415-646-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC CNTRL CA
2015-07-16 415-646-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2015-07-16 415-646-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC CNTRL CA
2015-07-16 415-982-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2015-07-16 415-986-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2015-07-15 415-360-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C MILLVALLEY CA
2015-07-15 415-360-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C MILLVALLEY CA
2015-07-10 415-918-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC CNTRL CA
2015-07-10 415-918-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC CNTRL CA
2015-07-10 415-918-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 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.