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
Clear Download CSV ↓
Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2005-06-29 415-992-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNFC CNTRL CA
2005-06-17 415-317-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC MT-EV CA
2005-06-16 415-534-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C STNSN-BLNS CA
2005-06-16 415-873-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C POINTREYES CA
2005-06-10 415-259-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 SAN RAFAEL CA
2005-05-25 415-671-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNFC CNTRL CA
2005-05-25 415-676-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNFC CNTRL CA
2005-05-25 415-676-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNFC CNTRL CA
2005-05-25 415-676-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNFC CNTRL CA
2005-05-25 415-676-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNFC CNTRL CA
2005-05-24 415-295-0XXX 0000–0999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SAN RAFAEL CA
2005-05-20 415-367-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SAUSALITO CA
2005-05-20 415-887-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C SAUSALITO CA
2005-05-20 415-887-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C SAUSALITO CA
2005-05-20 415-887-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SAUSALITO CA
2005-05-13 415-408-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 NOVATO CA
2005-05-12 415-513-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC CNTRL CA
2005-05-12 415-513-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC CNTRL CA
2005-05-12 415-839-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC CNTRL CA
2005-05-12 415-839-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC CNTRL CA
2005-05-12 415-839-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC CNTRL CA
2005-05-12 415-839-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC CNTRL CA
2005-05-12 415-839-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC CNTRL CA
2005-05-12 415-839-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC CNTRL CA
2005-05-10 415-390-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C POINTREYES CA
2005-05-10 415-390-9XXX 9000–9999Assigned ONVOY, LLC - CA 649C POINTREYES CA
2005-05-10 415-450-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SAN RAFAEL CA
2005-05-10 415-450-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SAN RAFAEL CA
2005-05-05 415-325-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C SNFC JUNPR CA
2005-05-05 415-574-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SNFC MT-EV CA
2005-05-05 415-574-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SNFC MT-EV CA
2005-05-05 415-574-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SNFC MT-EV CA
2005-05-05 415-614-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SNFC CNTRL CA
2005-05-05 415-614-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SNFC CNTRL CA
2005-05-05 415-614-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SNFC CNTRL CA
2005-04-13 415-513-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 SNFC CNTRL CA
2005-04-13 415-513-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 SNFC CNTRL CA
2005-04-13 415-513-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SNFC CNTRL CA
2005-04-13 415-513-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SNFC CNTRL CA
2005-03-25 415-295-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C SAN RAFAEL CA
2005-03-22 415-366-9XXX 9000–9999Assigned ONVOY, LLC - CA 649C BELVEDERE CA
2005-03-22 415-874-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SNFC CNTRL CA
2005-03-16 415-295-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C SAN RAFAEL CA
2005-03-16 415-843-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C MILLVALLEY CA
2005-03-14 415-324-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SAUSALITO CA
2005-03-10 415-727-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C INVERNESS CA
2005-03-09 415-944-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SAUSALITO CA
2005-03-09 415-944-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SAUSALITO CA
2005-03-08 415-992-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 SNFC CNTRL CA
2005-03-06 415-513-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 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.