NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

2 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 623
BOOST SUBSCRIBERCO L.L.C. 2
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
2020-10-12 623-356-8XXX 8000–8999Assigned ONVOY, LLC - AZ 630E PHOENIX AZ
2020-10-09 623-356-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - AZ 7217 PHOENIX AZ
2020-09-29 623-264-0XXX 0000–0999Assigned ONVOY, LLC - AZ 630E PHOENIX AZ
2020-09-29 623-264-1XXX 1000–1999Assigned ONVOY, LLC - AZ 630E PHOENIX AZ
2020-09-29 623-264-2XXX 2000–2999Assigned ONVOY, LLC - AZ 630E PHOENIX AZ
2020-09-29 623-264-3XXX 3000–3999Assigned ONVOY, LLC - AZ 630E PHOENIX AZ
2020-09-29 623-264-4XXX 4000–4999Assigned ONVOY, LLC - AZ 630E PHOENIX AZ
2020-09-29 623-264-5XXX 5000–5999Assigned ONVOY, LLC - AZ 630E PHOENIX AZ
2020-09-29 623-264-6XXX 6000–6999Assigned ONVOY, LLC - AZ 630E PHOENIX AZ
2020-09-29 623-264-7XXX 7000–7999Assigned ONVOY, LLC - AZ 630E PHOENIX AZ
2020-09-29 623-264-8XXX 8000–8999Assigned ONVOY, LLC - AZ 630E PHOENIX AZ
2020-09-28 623-356-7XXX 7000–7999Assigned FRACTEL, LLC 965H PHOENIX AZ
2020-09-28 623-356-9XXX 9000–9999Assigned FRACTEL, LLC 965H PHOENIX AZ
2020-09-17 623-264-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 PHOENIX AZ
2020-09-16 623-265-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 PHOENIX AZ
2020-09-16 623-265-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 PHOENIX AZ
2020-09-10 623-265-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 PHOENIX AZ
2020-09-10 623-265-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 PHOENIX AZ
2020-09-10 623-265-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 PHOENIX AZ
2020-09-10 623-265-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 PHOENIX AZ
2020-09-10 623-265-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 PHOENIX AZ
2020-09-10 623-265-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 PHOENIX AZ
2020-09-10 623-265-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 PHOENIX AZ
2020-09-09 623-265-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J PHOENIX AZ
2020-09-09 623-292-2XXX 2000–2999Assigned ONVOY, LLC - AZ 630E PHOENIX AZ
2020-09-09 623-292-3XXX 3000–3999Assigned ONVOY, LLC - AZ 630E PHOENIX AZ
2020-09-09 623-292-4XXX 4000–4999Assigned ONVOY, LLC - AZ 630E PHOENIX AZ
2020-09-09 623-292-5XXX 5000–5999Assigned ONVOY, LLC - AZ 630E PHOENIX AZ
2020-09-09 623-292-6XXX 6000–6999Assigned ONVOY, LLC - AZ 630E PHOENIX AZ
2020-09-09 623-292-7XXX 7000–7999Assigned ONVOY, LLC - AZ 630E PHOENIX AZ
2020-09-09 623-292-8XXX 8000–8999Assigned ONVOY, LLC - AZ 630E PHOENIX AZ
2020-09-03 623-292-0XXX 0000–0999Assigned METROPCS, INC. 5562 PHOENIX AZ
2020-09-03 623-292-1XXX 1000–1999Assigned METROPCS, INC. 5562 PHOENIX AZ
2020-09-03 623-292-9XXX 9000–9999Assigned METROPCS, INC. 5562 PHOENIX AZ
2020-08-18 623-400-9XXX 9000–9999Assigned RE-INVENT TELECOM, LLC - AZ 663G PHOENIX AZ
2020-07-27 623-257-9XXX 9000–9999Assigned ONVOY, LLC - AZ 630E PHOENIX AZ
2020-07-27 623-400-1XXX 1000–1999Assigned ONVOY, LLC - AZ 630E PHOENIX AZ
2020-07-27 623-400-2XXX 2000–2999Assigned ONVOY, LLC - AZ 630E PHOENIX AZ
2020-07-27 623-400-3XXX 3000–3999Assigned ONVOY, LLC - AZ 630E PHOENIX AZ
2020-07-27 623-400-5XXX 5000–5999Assigned ONVOY, LLC - AZ 630E PHOENIX AZ
2020-07-27 623-400-6XXX 6000–6999Assigned ONVOY, LLC - AZ 630E PHOENIX AZ
2020-07-27 623-400-7XXX 7000–7999Assigned ONVOY, LLC - AZ 630E PHOENIX AZ
2020-07-27 623-400-8XXX 8000–8999Assigned ONVOY, LLC - AZ 630E PHOENIX AZ
2020-07-27 623-632-0XXX 0000–0999Assigned ONVOY, LLC - AZ 630E PHOENIX AZ
2020-07-27 623-632-1XXX 1000–1999Assigned ONVOY, LLC - AZ 630E PHOENIX AZ
2020-07-15 623-257-5XXX 5000–5999Assigned ONVOY, LLC - AZ 630E PHOENIX AZ
2020-07-15 623-257-6XXX 6000–6999Assigned ONVOY, LLC - AZ 630E PHOENIX AZ
2020-07-15 623-257-7XXX 7000–7999Assigned ONVOY, LLC - AZ 630E PHOENIX AZ
2020-07-15 623-257-8XXX 8000–8999Assigned ONVOY, LLC - AZ 630E PHOENIX AZ
2020-07-15 623-400-0XXX 0000–0999Assigned FRACTEL, LLC 965H PHOENIX AZ

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.