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
2020-11-04 520-492-2XXX 2000–2999Assigned ONVOY, LLC - AZ 630E TUCSON AZ
2020-11-04 520-492-4XXX 4000–4999Assigned ONVOY, LLC - AZ 630E TUCSON AZ
2020-11-04 520-492-6XXX 6000–6999Assigned ONVOY, LLC - AZ 630E TUCSON AZ
2020-11-04 520-492-7XXX 7000–7999Assigned ONVOY, LLC - AZ 630E TUCSON AZ
2020-11-04 520-492-8XXX 8000–8999Assigned ONVOY, LLC - AZ 630E TUCSON AZ
2020-11-04 520-492-9XXX 9000–9999Assigned ONVOY, LLC - AZ 630E TUCSON AZ
2020-11-02 520-246-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 TUCSON AZ
2020-11-02 520-246-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 TUCSON AZ
2020-10-30 520-650-5XXX 5000–5999Assigned ONVOY, LLC - AZ 630E WHITLOW AZ
2020-10-30 520-650-6XXX 6000–6999Assigned ONVOY, LLC - AZ 630E WHITLOW AZ
2020-10-28 520-380-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 CASAGRANDE AZ
2020-10-28 520-472-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CASAGRANDE AZ
2020-10-28 520-478-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - AZ 7217 AJO AZ
2020-10-28 520-759-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CASAGRANDE AZ
2020-10-27 520-521-9XXX 9000–9999Assigned HD CARRIER LLC 321J SAN MANUEL AZ
2020-10-26 520-379-8XXX 8000–8999Assigned ONVOY, LLC - AZ 630E DOUGLAS AZ
2020-10-26 520-380-4XXX 4000–4999Assigned ONVOY, LLC - AZ 630E CASAGRANDE AZ
2020-10-26 520-380-5XXX 5000–5999Assigned ONVOY, LLC - AZ 630E CASAGRANDE AZ
2020-10-26 520-386-8XXX 8000–8999Assigned ONVOY, LLC - AZ 630E BENSON AZ
2020-10-26 520-436-9XXX 9000–9999Assigned ONVOY, LLC - AZ 630E HAYDEN AZ
2020-10-26 520-453-2XXX 2000–2999Assigned ONVOY, LLC - AZ 630E TOMBSTONE AZ
2020-10-26 520-453-3XXX 3000–3999Assigned ONVOY, LLC - AZ 630E TOMBSTONE AZ
2020-10-26 520-501-5XXX 5000–5999Assigned TWILIO INTERNATIONAL, INC. 506J TUCSON AZ
2020-10-26 520-502-6XXX 6000–6999Assigned ONVOY, LLC - AZ 630E SASABE AZ
2020-10-26 520-502-7XXX 7000–7999Assigned ONVOY, LLC - AZ 630E SASABE AZ
2020-10-26 520-525-4XXX 4000–4999Assigned ONVOY, LLC - AZ 630E BISBEE AZ
2020-10-26 520-530-0XXX 0000–0999Assigned METROPCS, INC. 5562 TUCSON AZ
2020-10-26 520-530-1XXX 1000–1999Assigned METROPCS, INC. 5562 TUCSON AZ
2020-10-26 520-530-8XXX 8000–8999Assigned METROPCS, INC. 5562 TUCSON AZ
2020-10-26 520-530-9XXX 9000–9999Assigned METROPCS, INC. 5562 TUCSON AZ
2020-10-26 520-779-8XXX 8000–8999Assigned ONVOY, LLC - AZ 630E WILLCOX AZ
2020-10-26 520-779-9XXX 9000–9999Assigned ONVOY, LLC - AZ 630E WILLCOX AZ
2020-10-26 520-924-2XXX 2000–2999Assigned ONVOY, LLC - AZ 630E NOGALES AZ
2020-10-22 520-264-0XXX 0000–0999Assigned TELNYX LLC 073H NOGALES AZ
2020-10-22 520-348-9XXX 9000–9999Assigned TELNYX LLC 073H WILLCOX AZ
2020-10-22 520-386-1XXX 1000–1999Assigned TELNYX LLC 073H BENSON AZ
2020-10-22 520-453-1XXX 1000–1999Assigned TELNYX LLC 073H TOMBSTONE AZ
2020-10-22 520-453-7XXX 7000–7999Assigned HD CARRIER LLC 321J TOMBSTONE AZ
2020-10-22 520-453-8XXX 8000–8999Assigned HD CARRIER LLC 321J TOMBSTONE AZ
2020-10-22 520-472-6XXX 6000–6999Assigned QWEST CORPORATION 9636 CASAGRANDE AZ
2020-10-22 520-523-1XXX 1000–1999Assigned TELNYX LLC 073H SIERRAVIST AZ
2020-10-22 520-525-0XXX 0000–0999Assigned TELNYX LLC 073H BISBEE AZ
2020-10-22 520-525-8XXX 8000–8999Assigned HD CARRIER LLC 321J BISBEE AZ
2020-10-22 520-636-4XXX 4000–4999Assigned HD CARRIER LLC 321J SAN MANUEL AZ
2020-10-22 520-655-0XXX 0000–0999Assigned TELNYX LLC 073H SUPERIOR AZ
2020-10-21 520-438-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F WHITLOW AZ
2020-10-20 520-758-6XXX 6000–6999Assigned FRACTEL, LLC 965H BLACKWATER AZ
2020-10-20 520-966-6XXX 6000–6999Assigned FRACTEL, LLC 965H SILVERBELL AZ
2020-10-19 520-523-4XXX 4000–4999Assigned ONVOY, LLC - AZ 630E SIERRAVIST AZ
2020-10-19 520-523-7XXX 7000–7999Assigned ONVOY, LLC - AZ 630E SIERRAVIST 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.