NumberResearch Membership · Data 09/19/2026

Recent thousands-block assignments

2 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/19/2026

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
2021-03-02 623-920-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 PHOENIX AZ
2021-03-02 623-920-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 PHOENIX AZ
2021-03-02 623-920-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 PHOENIX AZ
2021-02-08 623-920-0XXX 0000–0999Assigned ONVOY, LLC - AZ 630E PHOENIX AZ
2021-01-28 623-269-0XXX 0000–0999Assigned ONVOY SPECTRUM, LLC 624H PHOENIX AZ
2020-12-30 623-269-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 PHOENIX AZ
2020-12-30 623-269-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 PHOENIX AZ
2020-12-22 623-269-5XXX 5000–5999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - AZ 7217 PHOENIX AZ
2020-12-22 623-269-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - AZ 7217 PHOENIX AZ
2020-12-22 623-269-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - AZ 7217 PHOENIX AZ
2020-12-18 623-269-8XXX 8000–8999Assigned TELNYX LLC 073H PHOENIX AZ
2020-12-18 623-269-9XXX 9000–9999Assigned TELNYX LLC 073H PHOENIX AZ
2020-12-14 623-272-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 PHOENIX AZ
2020-12-14 623-272-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 PHOENIX AZ
2020-12-14 623-272-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 PHOENIX AZ
2020-12-14 623-272-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 PHOENIX AZ
2020-12-14 623-272-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 PHOENIX AZ
2020-12-14 623-272-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 PHOENIX AZ
2020-12-14 623-272-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 PHOENIX AZ
2020-12-14 623-272-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 PHOENIX AZ
2020-12-14 623-272-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 PHOENIX AZ
2020-12-14 623-272-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 PHOENIX AZ
2020-12-10 623-269-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J PHOENIX AZ
2020-12-10 623-269-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J PHOENIX AZ
2020-11-25 623-267-0XXX 0000–0999Assigned ONVOY, LLC - AZ 630E PHOENIX AZ
2020-11-25 623-267-1XXX 1000–1999Assigned ONVOY, LLC - AZ 630E PHOENIX AZ
2020-11-25 623-267-2XXX 2000–2999Assigned ONVOY, LLC - AZ 630E PHOENIX AZ
2020-11-25 623-267-3XXX 3000–3999Assigned ONVOY, LLC - AZ 630E PHOENIX AZ
2020-11-25 623-267-4XXX 4000–4999Assigned ONVOY, LLC - AZ 630E PHOENIX AZ
2020-11-25 623-267-5XXX 5000–5999Assigned ONVOY, LLC - AZ 630E PHOENIX AZ
2020-11-25 623-267-6XXX 6000–6999Assigned ONVOY, LLC - AZ 630E PHOENIX AZ
2020-11-25 623-267-8XXX 8000–8999Assigned ONVOY, LLC - AZ 630E PHOENIX AZ
2020-11-25 623-267-9XXX 9000–9999Assigned ONVOY, LLC - AZ 630E PHOENIX AZ
2020-11-19 623-267-7XXX 7000–7999Assigned TON80 COMMUNICATIONS, LLC 516J PHOENIX AZ
2020-11-11 623-303-0XXX 0000–0999Assigned ONVOY, LLC - AZ 630E PHOENIX AZ
2020-11-11 623-303-1XXX 1000–1999Assigned ONVOY, LLC - AZ 630E PHOENIX AZ
2020-11-11 623-303-2XXX 2000–2999Assigned ONVOY, LLC - AZ 630E PHOENIX AZ
2020-11-11 623-303-3XXX 3000–3999Assigned ONVOY, LLC - AZ 630E PHOENIX AZ
2020-11-11 623-303-4XXX 4000–4999Assigned ONVOY, LLC - AZ 630E PHOENIX AZ
2020-11-11 623-303-5XXX 5000–5999Assigned ONVOY, LLC - AZ 630E PHOENIX AZ
2020-11-11 623-303-6XXX 6000–6999Assigned ONVOY, LLC - AZ 630E PHOENIX AZ
2020-11-11 623-303-7XXX 7000–7999Assigned ONVOY, LLC - AZ 630E PHOENIX AZ
2020-11-11 623-303-8XXX 8000–8999Assigned ONVOY, LLC - AZ 630E PHOENIX AZ
2020-11-11 623-303-9XXX 9000–9999Assigned ONVOY, LLC - AZ 630E PHOENIX AZ
2020-10-12 623-356-0XXX 0000–0999Assigned ONVOY, LLC - AZ 630E PHOENIX AZ
2020-10-12 623-356-1XXX 1000–1999Assigned ONVOY, LLC - AZ 630E PHOENIX AZ
2020-10-12 623-356-2XXX 2000–2999Assigned ONVOY, LLC - AZ 630E PHOENIX AZ
2020-10-12 623-356-3XXX 3000–3999Assigned ONVOY, LLC - AZ 630E PHOENIX AZ
2020-10-12 623-356-4XXX 4000–4999Assigned ONVOY, LLC - AZ 630E PHOENIX AZ
2020-10-12 623-356-5XXX 5000–5999Assigned ONVOY, LLC - AZ 630E PHOENIX AZ

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.