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
2020-04-21 415-348-9XXX 9000–9999Assigned AIRESPRING, INC. 996H SNFC CNTRL CA
2020-04-15 415-843-9XXX 9000–9999Assigned METROPCS, INC. 5562 MILLVALLEY CA
2020-04-14 415-495-9XXX 9000–9999Assigned ONVOY SPECTRUM, LLC 624H SNFC CNTRL CA
2019-08-06 415-798-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 NOVATO CA
2019-06-21 415-375-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 SNFC MT-EV CA
2019-02-28 415-858-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 NOVATO CA
2019-01-24 415-455-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C SAN RAFAEL CA
2019-01-24 415-455-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C SAN RAFAEL CA
2019-01-24 415-460-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C SAN RAFAEL CA
2019-01-24 415-492-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C SAN RAFAEL CA
2019-01-24 415-900-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C BELVEDERE CA
2019-01-04 415-289-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SAUSALITO CA
2019-01-04 415-942-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SAUSALITO CA
2018-12-27 415-352-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SNFC CNTRL CA
2018-12-27 415-882-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 SNFC CNTRL CA
2018-12-03 415-815-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 SNFC CNTRL CA
2018-12-03 415-815-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 SNFC CNTRL CA
2018-11-29 415-831-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C SNFC MT-EV CA
2018-11-29 415-960-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C BELVEDERE CA
2018-11-29 415-960-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C BELVEDERE CA
2018-11-16 415-815-2XXX 2000–2999Assigned SONIC TELECOM, LLC - CA 433E SNFC CNTRL CA
2018-10-18 415-815-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 SNFC CNTRL CA
2018-09-13 415-808-9XXX 9000–9999Assigned METROPCS, INC. 5562 SNFC CNTRL CA
2018-07-03 415-960-0XXX 0000–0999Assigned INTEGRATED PATH COMMUNICATIONS, LLC - CA 707H BELVEDERE CA
2018-04-04 415-960-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 BELVEDERE CA
2018-01-16 415-934-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2018-01-08 415-876-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC MT-EV CA
2017-11-29 415-880-0XXX 0000–0999Assigned UTILITY TELECOM GROUP, LLC - CA 9262 SNFC JUNPR CA
2017-11-29 415-880-1XXX 1000–1999Assigned UTILITY TELECOM GROUP, LLC - CA 9262 SNFC JUNPR CA
2017-11-29 415-880-2XXX 2000–2999Assigned UTILITY TELECOM GROUP, LLC - CA 9262 SNFC JUNPR CA
2017-11-29 415-880-3XXX 3000–3999Assigned UTILITY TELECOM GROUP, LLC - CA 9262 SNFC JUNPR CA
2017-11-29 415-880-4XXX 4000–4999Assigned UTILITY TELECOM GROUP, LLC - CA 9262 SNFC JUNPR CA
2017-11-29 415-880-5XXX 5000–5999Assigned UTILITY TELECOM GROUP, LLC - CA 9262 SNFC JUNPR CA
2017-08-15 415-840-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C SNFC JUNPR CA
2017-06-29 415-463-3XXX 3000–3999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SNFC MT-EV CA
2017-01-12 415-504-9XXX 9000–9999Assigned IP HORIZON LLC 515J SNFC MT-EV CA
2016-12-14 415-477-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC CNTRL CA
2016-08-30 415-301-3XXX 3000–3999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F NOVATO CA
2016-08-24 415-639-4XXX 4000–4999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F INVERNESS CA
2016-08-16 415-726-5XXX 5000–5999Assigned IP HORIZON LLC 515J SAN RAFAEL CA
2016-08-15 415-304-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2016-08-12 415-304-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C SNFC CNTRL CA
2016-06-28 415-949-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 NICASIO CA
2016-06-22 415-818-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C SNFC JUNPR CA
2016-06-22 415-818-9XXX 9000–9999Assigned ONVOY, LLC - CA 649C SNFC JUNPR CA
2016-06-21 415-569-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C MILLVALLEY CA
2016-05-16 415-909-1XXX 1000–1999Assigned HD CARRIER LLC 321J SNFC JUNPR CA
2016-05-16 415-909-2XXX 2000–2999Assigned HD CARRIER LLC 321J SNFC JUNPR CA
2016-05-16 415-909-6XXX 6000–6999Assigned HD CARRIER LLC 321J SNFC JUNPR CA
2016-05-03 415-909-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 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.