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 480
TELEPORT COMMUNICATIONS AMERICA, LLC - AZ 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
2019-06-17 480-591-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 PHOENIX AZ
2019-06-11 480-591-8XXX 8000–8999Assigned TELNYX LLC 073H PHOENIX AZ
2019-06-11 480-591-9XXX 9000–9999Assigned TELNYX LLC 073H PHOENIX AZ
2019-06-03 480-591-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F PHOENIX AZ
2019-06-03 480-591-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F PHOENIX AZ
2019-06-03 480-591-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F PHOENIX AZ
2019-06-03 480-591-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F PHOENIX AZ
2019-06-03 480-591-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F PHOENIX AZ
2019-06-03 480-591-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F PHOENIX AZ
2019-05-28 480-536-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F PHOENIX AZ
2019-05-28 480-536-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F PHOENIX AZ
2019-05-28 480-536-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F PHOENIX AZ
2019-05-28 480-536-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F PHOENIX AZ
2019-05-23 480-937-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 PHOENIX AZ
2019-05-23 480-937-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 PHOENIX AZ
2019-05-23 480-937-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 PHOENIX AZ
2019-05-23 480-937-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 PHOENIX AZ
2019-05-14 480-937-5XXX 5000–5999Assigned QWEST CORPORATION 9636 PHOENIX AZ
2019-05-07 480-937-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 PHOENIX AZ
2019-05-07 480-937-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 PHOENIX AZ
2019-04-26 480-937-2XXX 2000–2999Assigned PEERLESS NETWORK OF ARIZONA, LLC - AZ 579F PHOENIX AZ
2019-04-17 480-937-1XXX 1000–1999Assigned RE-INVENT TELECOM, LLC - AZ 663G PHOENIX AZ
2019-04-12 480-937-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F PHOENIX AZ
2019-04-08 480-561-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F PHOENIX AZ
2019-04-08 480-561-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F PHOENIX AZ
2019-04-08 480-561-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F PHOENIX AZ
2019-04-08 480-561-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F PHOENIX AZ
2019-04-08 480-561-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F PHOENIX AZ
2019-03-28 480-546-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 PHOENIX AZ
2019-03-28 480-561-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 PHOENIX AZ
2019-03-28 480-561-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 PHOENIX AZ
2019-03-28 480-561-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 PHOENIX AZ
2019-03-25 480-561-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 PHOENIX AZ
2019-03-25 480-561-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 PHOENIX AZ
2019-03-21 480-605-0XXX 0000–0999Assigned ONVOY, LLC - AZ 630E PHOENIX AZ
2019-03-21 480-605-1XXX 1000–1999Assigned ONVOY, LLC - AZ 630E PHOENIX AZ
2019-03-21 480-605-2XXX 2000–2999Assigned ONVOY, LLC - AZ 630E PHOENIX AZ
2019-03-21 480-605-3XXX 3000–3999Assigned ONVOY, LLC - AZ 630E PHOENIX AZ
2019-03-21 480-605-4XXX 4000–4999Assigned ONVOY, LLC - AZ 630E PHOENIX AZ
2019-03-21 480-605-5XXX 5000–5999Assigned ONVOY, LLC - AZ 630E PHOENIX AZ
2019-03-21 480-605-6XXX 6000–6999Assigned ONVOY, LLC - AZ 630E PHOENIX AZ
2019-03-21 480-605-7XXX 7000–7999Assigned ONVOY, LLC - AZ 630E PHOENIX AZ
2019-03-21 480-605-8XXX 8000–8999Assigned ONVOY, LLC - AZ 630E PHOENIX AZ
2019-03-21 480-605-9XXX 9000–9999Assigned ONVOY, LLC - AZ 630E PHOENIX AZ
2019-03-15 480-546-3XXX 3000–3999Assigned ONVOY, LLC - AZ 630E PHOENIX AZ
2019-03-15 480-546-4XXX 4000–4999Assigned ONVOY, LLC - AZ 630E PHOENIX AZ
2019-03-15 480-546-5XXX 5000–5999Assigned ONVOY, LLC - AZ 630E PHOENIX AZ
2019-03-15 480-546-6XXX 6000–6999Assigned ONVOY, LLC - AZ 630E PHOENIX AZ
2019-03-15 480-546-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J PHOENIX AZ
2019-03-15 480-546-8XXX 8000–8999Assigned ONVOY, LLC - AZ 630E 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.