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
2009-08-19 415-937-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E BELVEDERE CA
2009-08-19 415-968-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E MILLVALLEY CA
2009-08-19 415-997-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E NICASIO CA
2009-07-30 415-742-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C SNFC MT-EV CA
2009-07-30 415-742-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C SNFC MT-EV CA
2009-07-30 415-746-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C SNFC CNTRL CA
2009-07-30 415-829-9XXX 9000–9999Assigned ONVOY, LLC - CA 649C SNFC CNTRL CA
2009-07-30 415-871-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC CNTRL CA
2009-07-30 415-932-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C SNFC CNTRL CA
2009-07-29 415-446-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SAN RAFAEL CA
2009-07-17 415-645-2XXX 2000–2999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SNFC CNTRL CA
2009-07-02 415-400-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 SNFC CNTRL CA
2009-07-02 415-400-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SNFC CNTRL CA
2009-07-01 415-325-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SNFC JUNPR CA
2009-06-22 415-937-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 BELVEDERE CA
2009-04-29 415-742-5XXX 5000–5999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SNFC MT-EV CA
2009-04-28 415-735-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNFC CNTRL CA
2009-04-16 415-294-8XXX 8000–8999Assigned PAETEC ITEL, LLC 829J SNFC JUNPR CA
2009-04-16 415-400-0XXX 0000–0999Assigned PAETEC ITEL, LLC 829J SNFC CNTRL CA
2009-03-27 415-400-7XXX 7000–7999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNFC CNTRL CA
2009-03-27 415-400-8XXX 8000–8999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNFC CNTRL CA
2009-03-25 415-400-4XXX 4000–4999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SNFC CNTRL CA
2009-03-25 415-400-5XXX 5000–5999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SNFC CNTRL CA
2009-03-12 415-410-1XXX 1000–1999Assigned METROPCS, INC. 5562 SNFC MT-EV CA
2009-03-12 415-410-9XXX 9000–9999Assigned METROPCS, INC. 5562 SNFC MT-EV CA
2009-03-11 415-685-6XXX 6000–6999Assigned METROPCS, INC. 5562 SNFC CNTRL CA
2009-03-11 415-685-7XXX 7000–7999Assigned METROPCS, INC. 5562 SNFC CNTRL CA
2009-03-09 415-400-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SNFC CNTRL CA
2009-03-09 415-400-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SNFC CNTRL CA
2009-02-19 415-494-3XXX 3000–3999Assigned UTILITY TELECOM GROUP, LLC - CA 9262 SNFC JUNPR CA
2009-02-19 415-685-2XXX 2000–2999Assigned UTILITY TELECOM GROUP, LLC - CA 9262 SNFC CNTRL CA
2009-02-19 415-742-3XXX 3000–3999Assigned UTILITY TELECOM GROUP, LLC - CA 9262 SNFC MT-EV CA
2009-02-17 415-363-0XXX 0000–0999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SNFC CNTRL CA
2009-02-17 415-363-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C SNFC CNTRL CA
2009-02-17 415-363-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C SNFC CNTRL CA
2009-02-17 415-363-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C SNFC CNTRL CA
2009-02-17 415-363-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C SNFC CNTRL CA
2009-02-17 415-363-5XXX 5000–5999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SNFC CNTRL CA
2009-02-17 415-363-6XXX 6000–6999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SNFC CNTRL CA
2009-02-17 415-363-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C SNFC CNTRL CA
2009-02-17 415-363-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C SNFC CNTRL CA
2009-02-17 415-363-9XXX 9000–9999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SNFC CNTRL CA
2009-02-17 415-754-6XXX 6000–6999Assigned UTILITY TELECOM GROUP, LLC - CA 9262 SAUSALITO CA
2009-02-11 415-684-2XXX 2000–2999Assigned METROPCS, INC. 5562 SNFC CNTRL CA
2009-02-11 415-685-1XXX 1000–1999Assigned METROPCS, INC. 5562 SNFC CNTRL CA
2009-02-11 415-894-7XXX 7000–7999Assigned METROPCS, INC. 5562 SNFC CNTRL CA
2009-01-26 415-669-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E INVERNESS CA
2009-01-26 415-868-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E STNSN-BLNS CA
2009-01-26 415-938-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E POINTREYES CA
2009-01-26 415-997-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E NICASIO 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.