NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

5 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 520
NEW CINGULAR WIRELESS PCS, LLC 3
INTRADO COMMUNICATIONS, LLC 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
2020-05-08 520-523-3XXX 3000–3999Assigned ONVOY, LLC - AZ 630E SIERRAVIST AZ
2020-05-08 520-525-2XXX 2000–2999Assigned ONVOY, LLC - AZ 630E BISBEE AZ
2020-05-08 520-525-5XXX 5000–5999Assigned ONVOY, LLC - AZ 630E BISBEE AZ
2020-05-05 520-436-4XXX 4000–4999Assigned ONVOY, LLC - AZ 630E HAYDEN AZ
2020-05-05 520-436-5XXX 5000–5999Assigned ONVOY, LLC - AZ 630E HAYDEN AZ
2020-04-24 520-216-9XXX 9000–9999Assigned METROPCS, INC. 5562 NOGALES AZ
2020-04-24 520-420-8XXX 8000–8999Assigned METROPCS, INC. 5562 TUCSON AZ
2020-04-24 520-438-3XXX 3000–3999Assigned ONVOY, LLC - AZ 630E WHITLOW AZ
2020-04-24 520-438-4XXX 4000–4999Assigned ONVOY, LLC - AZ 630E WHITLOW AZ
2020-04-14 520-386-3XXX 3000–3999Assigned ONVOY, LLC - AZ 630E BENSON AZ
2020-04-14 520-386-5XXX 5000–5999Assigned ONVOY, LLC - AZ 630E BENSON AZ
2020-03-25 520-346-9XXX 9000–9999Assigned ONVOY, LLC - AZ 630E BISBEE AZ
2020-03-25 520-412-8XXX 8000–8999Assigned ONVOY, LLC - AZ 630E TOMBSTONE AZ
2020-03-06 520-376-4XXX 4000–4999Assigned PEERLESS NETWORK OF ARIZONA, LLC - AZ 579F SIERRAVIST AZ
2020-03-06 520-412-7XXX 7000–7999Assigned PEERLESS NETWORK OF ARIZONA, LLC - AZ 579F TOMBSTONE AZ
2020-03-03 520-376-1XXX 1000–1999Assigned ONVOY, LLC - AZ 630E SIERRAVIST AZ
2020-03-03 520-376-2XXX 2000–2999Assigned ONVOY, LLC - AZ 630E SIERRAVIST AZ
2020-03-03 520-380-2XXX 2000–2999Assigned PEERLESS NETWORK OF ARIZONA, LLC - AZ 579F CASAGRANDE AZ
2020-03-03 520-397-3XXX 3000–3999Assigned ONVOY, LLC - AZ 630E NOGALES AZ
2020-03-03 520-597-2XXX 2000–2999Assigned ONVOY, LLC - AZ 630E SUPERIOR AZ
2020-03-03 520-619-4XXX 4000–4999Assigned ONVOY, LLC - AZ 630E NOGALES AZ
2020-02-14 520-420-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 TUCSON AZ
2020-02-14 520-420-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 TUCSON AZ
2020-02-13 520-467-0XXX 0000–0999Assigned ONVOY, LLC - AZ 630E TUCSON AZ
2020-02-13 520-467-1XXX 1000–1999Assigned ONVOY, LLC - AZ 630E TUCSON AZ
2020-02-13 520-467-2XXX 2000–2999Assigned ONVOY, LLC - AZ 630E TUCSON AZ
2020-02-13 520-467-6XXX 6000–6999Assigned ONVOY, LLC - AZ 630E TUCSON AZ
2020-02-13 520-467-7XXX 7000–7999Assigned ONVOY, LLC - AZ 630E TUCSON AZ
2020-02-10 520-346-0XXX 0000–0999Assigned PEERLESS NETWORK OF ARIZONA, LLC - AZ 579F BISBEE AZ
2020-02-10 520-988-9XXX 9000–9999Assigned PEERLESS NETWORK OF ARIZONA, LLC - AZ 579F NOGALES AZ
2020-02-05 520-420-1XXX 1000–1999Assigned PEERLESS NETWORK OF ARIZONA, LLC - AZ 579F TUCSON AZ
2020-02-04 520-467-8XXX 8000–8999Assigned METROPCS, INC. 5562 TUCSON AZ
2020-02-04 520-467-9XXX 9000–9999Assigned METROPCS, INC. 5562 TUCSON AZ
2020-01-23 520-346-8XXX 8000–8999Assigned ONVOY, LLC - AZ 630E BISBEE AZ
2020-01-14 520-420-0XXX 0000–0999Assigned METROPCS, INC. 5562 TUCSON AZ
2019-12-27 520-636-2XXX 2000–2999Assigned ONVOY, LLC - AZ 630E SAN MANUEL AZ
2019-12-20 520-467-3XXX 3000–3999Assigned ONVOY, LLC - AZ 630E TUCSON AZ
2019-12-20 520-467-4XXX 4000–4999Assigned ONVOY, LLC - AZ 630E TUCSON AZ
2019-12-20 520-467-5XXX 5000–5999Assigned ONVOY, LLC - AZ 630E TUCSON AZ
2019-12-19 520-420-9XXX 9000–9999Assigned HD CARRIER LLC 321J TUCSON AZ
2019-12-16 520-380-0XXX 0000–0999Assigned PEERLESS NETWORK OF ARIZONA, LLC - AZ 579F CASAGRANDE AZ
2019-12-16 520-386-0XXX 0000–0999Assigned PEERLESS NETWORK OF ARIZONA, LLC - AZ 579F BENSON AZ
2019-12-16 520-436-0XXX 0000–0999Assigned TELNYX LLC 073H HAYDEN AZ
2019-12-16 520-436-1XXX 1000–1999Assigned PEERLESS NETWORK OF ARIZONA, LLC - AZ 579F HAYDEN AZ
2019-12-12 520-386-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BENSON AZ
2019-12-10 520-379-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 DOUGLAS AZ
2019-11-27 520-779-2XXX 2000–2999Assigned ONVOY, LLC - AZ 630E WILLCOX AZ
2019-11-15 520-416-4XXX 4000–4999Assigned ONVOY, LLC - AZ 630E TUCSON AZ
2019-11-15 520-416-5XXX 5000–5999Assigned ONVOY, LLC - AZ 630E TUCSON AZ
2019-11-15 520-416-6XXX 6000–6999Assigned ONVOY, LLC - AZ 630E TUCSON 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.