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
2019-06-11 520-231-8XXX 8000–8999Assigned ONVOY, LLC - AZ 630E WHITLOW AZ
2019-06-11 520-317-6XXX 6000–6999Assigned ONVOY, LLC - AZ 630E HAYDEN AZ
2019-06-11 520-317-7XXX 7000–7999Assigned ONVOY, LLC - AZ 630E HAYDEN AZ
2019-06-11 520-341-5XXX 5000–5999Assigned ONVOY, LLC - AZ 630E NOGALES AZ
2019-06-11 520-341-6XXX 6000–6999Assigned ONVOY, LLC - AZ 630E NOGALES AZ
2019-06-11 520-346-6XXX 6000–6999Assigned ONVOY, LLC - AZ 630E BISBEE AZ
2019-06-11 520-346-7XXX 7000–7999Assigned ONVOY, LLC - AZ 630E BISBEE AZ
2019-06-11 520-376-6XXX 6000–6999Assigned ONVOY, LLC - AZ 630E SIERRAVIST AZ
2019-06-11 520-376-7XXX 7000–7999Assigned ONVOY, LLC - AZ 630E SIERRAVIST AZ
2019-06-11 520-379-3XXX 3000–3999Assigned ONVOY, LLC - AZ 630E DOUGLAS AZ
2019-06-11 520-379-7XXX 7000–7999Assigned ONVOY, LLC - AZ 630E DOUGLAS AZ
2019-06-11 520-402-4XXX 4000–4999Assigned ONVOY, LLC - AZ 630E BENSON AZ
2019-06-11 520-402-5XXX 5000–5999Assigned ONVOY, LLC - AZ 630E BENSON AZ
2019-06-11 520-412-4XXX 4000–4999Assigned ONVOY, LLC - AZ 630E TOMBSTONE AZ
2019-06-11 520-412-5XXX 5000–5999Assigned ONVOY, LLC - AZ 630E TOMBSTONE AZ
2019-06-11 520-597-4XXX 4000–4999Assigned ONVOY, LLC - AZ 630E SUPERIOR AZ
2019-06-11 520-597-5XXX 5000–5999Assigned ONVOY, LLC - AZ 630E SUPERIOR AZ
2019-06-11 520-636-5XXX 5000–5999Assigned ONVOY, LLC - AZ 630E SAN MANUEL AZ
2019-06-11 520-636-6XXX 6000–6999Assigned ONVOY, LLC - AZ 630E SAN MANUEL AZ
2019-06-11 520-779-5XXX 5000–5999Assigned ONVOY, LLC - AZ 630E WILLCOX AZ
2019-06-11 520-779-7XXX 7000–7999Assigned ONVOY, LLC - AZ 630E WILLCOX AZ
2019-05-22 520-231-7XXX 7000–7999Assigned PEERLESS NETWORK OF ARIZONA, LLC - AZ 579F WHITLOW AZ
2019-05-22 520-666-8XXX 8000–8999Assigned ONVOY, LLC - AZ 630E CASAGRANDE AZ
2019-05-22 520-666-9XXX 9000–9999Assigned ONVOY, LLC - AZ 630E CASAGRANDE AZ
2019-05-16 520-783-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J TUCSON AZ
2019-05-09 520-783-2XXX 2000–2999Assigned ONVOY, LLC - AZ 630E TUCSON AZ
2019-05-09 520-783-3XXX 3000–3999Assigned ONVOY, LLC - AZ 630E TUCSON AZ
2019-05-09 520-783-4XXX 4000–4999Assigned ONVOY, LLC - AZ 630E TUCSON AZ
2019-05-09 520-783-5XXX 5000–5999Assigned ONVOY, LLC - AZ 630E TUCSON AZ
2019-05-09 520-783-6XXX 6000–6999Assigned ONVOY, LLC - AZ 630E TUCSON AZ
2019-05-09 520-783-7XXX 7000–7999Assigned ONVOY, LLC - AZ 630E TUCSON AZ
2019-05-08 520-231-9XXX 9000–9999Assigned TELNYX LLC 073H WHITLOW AZ
2019-05-08 520-412-0XXX 0000–0999Assigned TELNYX LLC 073H TOMBSTONE AZ
2019-04-26 520-317-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F HAYDEN AZ
2019-04-26 520-783-0XXX 0000–0999Assigned PEERLESS NETWORK OF ARIZONA, LLC - AZ 579F TUCSON AZ
2019-04-18 520-493-0XXX 0000–0999Assigned FIRSTDIGITAL TELECOM, LLC - UT 5727 TUCSON AZ
2019-04-11 520-210-5XXX 5000–5999Assigned ONVOY, LLC - AZ 630E TOMBSTONE AZ
2019-03-06 520-759-6XXX 6000–6999Assigned METROPCS, INC. 5562 CASAGRANDE AZ
2019-02-21 520-376-9XXX 9000–9999Assigned METROPCS, INC. 5562 SIERRAVIST AZ
2019-02-20 520-759-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CASAGRANDE AZ
2019-02-13 520-783-1XXX 1000–1999Assigned METROPCS, INC. 5562 TUCSON AZ
2019-02-11 520-412-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 TOMBSTONE AZ
2019-02-07 520-783-9XXX 9000–9999Assigned METROPCS, INC. 5562 TUCSON AZ
2019-01-29 520-317-2XXX 2000–2999Assigned PEERLESS NETWORK OF ARIZONA, LLC - AZ 579F HAYDEN AZ
2019-01-29 520-341-9XXX 9000–9999Assigned METROPCS, INC. 5562 NOGALES AZ
2019-01-17 520-771-3XXX 3000–3999Assigned METROPCS, INC. 5562 TUCSON AZ
2019-01-17 520-771-4XXX 4000–4999Assigned METROPCS, INC. 5562 TUCSON AZ
2019-01-09 520-759-4XXX 4000–4999Assigned VOIP INNOVATIONS, LLC 597F CASAGRANDE AZ
2019-01-07 520-685-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J SIERRAVIST AZ
2019-01-07 520-685-9XXX 9000–9999Assigned COMCAST IP PHONE, LLC 318J 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.