NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

7 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 628
EXIANT COMMUNICATIONS LLC 3
ONVOY, LLC - CA 2
TELNYX LLC 1
OPENTACT INC. 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
2021-11-15 628-842-9XXX 9000–9999Assigned ONVOY SPECTRUM, LLC 624H CORTEMADRA CA
2021-11-15 628-866-2XXX 2000–2999Assigned ONVOY SPECTRUM, LLC 624H BELVEDERE CA
2021-11-15 628-866-3XXX 3000–3999Assigned ONVOY SPECTRUM, LLC 624H BELVEDERE CA
2021-11-08 628-358-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 SNFC CNTRL CA
2021-11-08 628-358-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 SNFC CNTRL CA
2021-11-08 628-358-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 SNFC CNTRL CA
2021-11-08 628-358-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 SNFC CNTRL CA
2021-11-08 628-358-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 SNFC CNTRL CA
2021-11-08 628-358-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 SNFC CNTRL CA
2021-11-08 628-358-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 SNFC CNTRL CA
2021-11-08 628-358-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SNFC CNTRL CA
2021-11-08 628-468-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 SNFC CNTRL CA
2021-11-08 628-468-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 SNFC CNTRL CA
2021-11-08 628-468-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 SNFC CNTRL CA
2021-11-08 628-468-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 SNFC CNTRL CA
2021-11-08 628-468-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SNFC CNTRL CA
2021-11-08 628-468-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SNFC CNTRL CA
2021-11-08 628-588-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 SNFC CNTRL CA
2021-11-05 628-279-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SAUSALITO CA
2021-11-04 628-377-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E IGNACIO CA
2021-11-03 628-313-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SAN RAFAEL CA
2021-11-01 628-977-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C SNFC MT-EV CA
2021-10-26 628-299-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC JUNPR CA
2021-10-20 628-667-3XXX 3000–3999Assigned ONVOY SPECTRUM, LLC 624H SAN RAFAEL CA
2021-10-18 628-587-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 NOVATO CA
2021-10-15 628-272-4XXX 4000–4999Assigned ONVOY SPECTRUM, LLC 624H POINTREYES CA
2021-10-15 628-272-5XXX 5000–5999Assigned ONVOY SPECTRUM, LLC 624H POINTREYES CA
2021-10-15 628-388-6XXX 6000–6999Assigned ONVOY SPECTRUM, LLC 624H INVERNESS CA
2021-10-15 628-388-7XXX 7000–7999Assigned ONVOY SPECTRUM, LLC 624H INVERNESS CA
2021-10-15 628-399-8XXX 8000–8999Assigned ONVOY SPECTRUM, LLC 624H SNFC MT-EV CA
2021-10-15 628-577-5XXX 5000–5999Assigned ONVOY SPECTRUM, LLC 624H NICASIO CA
2021-10-15 628-577-6XXX 6000–6999Assigned ONVOY SPECTRUM, LLC 624H NICASIO CA
2021-10-15 628-788-5XXX 5000–5999Assigned ONVOY SPECTRUM, LLC 624H SNFC MT-EV CA
2021-10-15 628-788-6XXX 6000–6999Assigned ONVOY SPECTRUM, LLC 624H SNFC MT-EV CA
2021-10-15 628-788-7XXX 7000–7999Assigned ONVOY SPECTRUM, LLC 624H SNFC MT-EV CA
2021-10-15 628-788-9XXX 9000–9999Assigned ONVOY SPECTRUM, LLC 624H SNFC MT-EV CA
2021-10-13 628-299-1XXX 1000–1999Assigned ONVOY SPECTRUM, LLC 624H SNFC JUNPR CA
2021-10-13 628-299-2XXX 2000–2999Assigned ONVOY SPECTRUM, LLC 624H SNFC JUNPR CA
2021-10-13 628-299-3XXX 3000–3999Assigned ONVOY SPECTRUM, LLC 624H SNFC JUNPR CA
2021-10-13 628-299-4XXX 4000–4999Assigned ONVOY SPECTRUM, LLC 624H SNFC JUNPR CA
2021-10-13 628-299-5XXX 5000–5999Assigned ONVOY SPECTRUM, LLC 624H SNFC JUNPR CA
2021-10-11 628-477-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MILLVALLEY CA
2021-10-08 628-388-2XXX 2000–2999Assigned VONAGE AMERICA LLC 197D INVERNESS CA
2021-10-08 628-577-2XXX 2000–2999Assigned VONAGE AMERICA LLC 197D NICASIO CA
2021-10-08 628-699-0XXX 0000–0999Assigned ONVOY SPECTRUM, LLC 624H SAUSALITO CA
2021-10-08 628-699-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C SAUSALITO CA
2021-10-08 628-699-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C SAUSALITO CA
2021-10-08 628-699-3XXX 3000–3999Assigned ONVOY SPECTRUM, LLC 624H SAUSALITO CA
2021-10-08 628-699-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C SAUSALITO CA
2021-10-08 628-699-5XXX 5000–5999Assigned ONVOY SPECTRUM, LLC 624H SAUSALITO 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.