NumberResearch Membership · Data 09/21/2026

Recent thousands-block assignments

1 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/21/2026

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
2013-05-08 415-463-6XXX 6000–6999Assigned SONIC TELECOM, LLC - CA 433E SNFC MT-EV CA
2013-05-08 415-737-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E CORTEMADRA CA
2013-05-08 415-737-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E CORTEMADRA CA
2013-05-07 415-481-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SNFC JUNPR CA
2013-05-07 415-481-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SNFC JUNPR CA
2013-05-07 415-521-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SAN RAFAEL CA
2013-04-29 415-767-3XXX 3000–3999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNFC CNTRL CA
2013-04-29 415-767-4XXX 4000–4999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNFC CNTRL CA
2013-04-29 415-842-8XXX 8000–8999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J IGNACIO CA
2013-04-24 415-549-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 SNFC CNTRL CA
2013-04-16 415-549-7XXX 7000–7999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SNFC CNTRL CA
2013-04-15 415-549-5XXX 5000–5999Assigned PAETEC ITEL, LLC 829J SNFC CNTRL CA
2013-04-08 415-549-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C SNFC CNTRL CA
2013-04-05 415-761-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E NOVATO CA
2013-04-05 415-761-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E NOVATO CA
2013-04-03 415-316-0XXX 0000–0999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F BELVEDERE CA
2013-04-03 415-549-8XXX 8000–8999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SNFC CNTRL CA
2013-04-03 415-549-9XXX 9000–9999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SNFC CNTRL CA
2013-04-03 415-797-0XXX 0000–0999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F BELVEDERE CA
2013-03-27 415-767-2XXX 2000–2999Assigned ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7174 SNFC CNTRL CA
2013-03-25 415-549-2XXX 2000–2999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 SNFC CNTRL CA
2013-03-22 415-231-0XXX 0000–0999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SNFC MT-EV CA
2013-03-22 415-231-1XXX 1000–1999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SNFC MT-EV CA
2013-03-14 415-635-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC CNTRL CA
2013-03-11 415-761-2XXX 2000–2999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F NOVATO CA
2013-03-06 415-231-3XXX 3000–3999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SNFC MT-EV CA
2013-03-06 415-236-4XXX 4000–4999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F INVERNESS CA
2013-03-06 415-323-4XXX 4000–4999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F NICASIO CA
2013-03-06 415-496-4XXX 4000–4999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F CORTEMADRA CA
2013-03-06 415-521-3XXX 3000–3999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SAN RAFAEL CA
2013-03-06 415-528-6XXX 6000–6999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SNFC JUNPR CA
2013-03-06 415-663-2XXX 2000–2999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F POINTREYES CA
2013-03-06 415-862-3XXX 3000–3999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F STNSN-BLNS CA
2013-03-06 415-877-3XXX 3000–3999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F MILLVALLEY CA
2013-03-06 415-881-5XXX 5000–5999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F IGNACIO CA
2013-02-28 415-237-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C INVERNESS CA
2013-02-28 415-316-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C BELVEDERE CA
2013-02-28 415-569-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C MILLVALLEY CA
2013-02-28 415-630-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C NICASIO CA
2013-02-28 415-688-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C SNFC MT-EV CA
2013-02-28 415-787-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C POINTREYES CA
2013-02-28 415-988-9XXX 9000–9999Assigned ONVOY, LLC - CA 649C SNFC JUNPR CA
2013-02-25 415-763-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 IGNACIO CA
2013-02-25 415-763-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 IGNACIO CA
2013-02-21 415-635-2XXX 2000–2999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNFC CNTRL CA
2013-02-21 415-635-3XXX 3000–3999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNFC CNTRL CA
2013-02-19 415-589-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2013-02-19 415-589-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2013-02-19 415-589-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2013-02-19 415-635-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/21/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.