NumberResearch Membership · Data 09/19/2026

Recent thousands-block assignments

5 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 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
2023-07-27 520-944-4XXX 4000–4999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - AZ 7217 SIERRAVIST AZ
2023-07-27 520-944-5XXX 5000–5999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - AZ 7217 SIERRAVIST AZ
2023-07-27 520-944-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - AZ 7217 SIERRAVIST AZ
2023-07-27 520-944-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - AZ 7217 SIERRAVIST AZ
2023-07-27 520-944-8XXX 8000–8999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - AZ 7217 SIERRAVIST AZ
2023-07-27 520-944-9XXX 9000–9999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - AZ 7217 SIERRAVIST AZ
2023-07-27 520-945-0XXX 0000–0999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - AZ 7217 SIERRAVIST AZ
2023-07-27 520-945-1XXX 1000–1999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - AZ 7217 SIERRAVIST AZ
2023-07-27 520-945-2XXX 2000–2999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - AZ 7217 SIERRAVIST AZ
2023-07-27 520-945-3XXX 3000–3999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - AZ 7217 SIERRAVIST AZ
2023-07-27 520-945-4XXX 4000–4999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - AZ 7217 SIERRAVIST AZ
2023-07-27 520-945-5XXX 5000–5999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - AZ 7217 SIERRAVIST AZ
2023-07-27 520-945-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - AZ 7217 SIERRAVIST AZ
2023-07-27 520-945-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - AZ 7217 SIERRAVIST AZ
2023-07-27 520-945-8XXX 8000–8999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - AZ 7217 SIERRAVIST AZ
2023-07-27 520-945-9XXX 9000–9999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - AZ 7217 SIERRAVIST AZ
2023-07-11 520-435-8XXX 8000–8999Assigned PEERLESS NETWORK OF ARIZONA, LLC - AZ 579F WILLCOX AZ
2023-07-11 520-654-9XXX 9000–9999Assigned PEERLESS NETWORK OF ARIZONA, LLC - AZ 579F SIERRAVIST AZ
2023-07-11 520-679-9XXX 9000–9999Assigned PEERLESS NETWORK OF ARIZONA, LLC - AZ 579F TOMBSTONE AZ
2023-06-26 520-608-6XXX 6000–6999Assigned ONVOY, LLC - AZ 630E SAN MANUEL AZ
2023-06-26 520-641-8XXX 8000–8999Assigned ONVOY, LLC - AZ 630E BENSON AZ
2023-06-26 520-681-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 NOGALES AZ
2023-06-22 520-652-1XXX 1000–1999Assigned ONVOY, LLC - AZ 630E WHITLOW AZ
2023-06-22 520-654-5XXX 5000–5999Assigned ONVOY, LLC - AZ 630E SIERRAVIST AZ
2023-06-22 520-655-7XXX 7000–7999Assigned ONVOY, LLC - AZ 630E SUPERIOR AZ
2023-06-22 520-657-2XXX 2000–2999Assigned ONVOY, LLC - AZ 630E HAYDEN AZ
2023-06-22 520-675-0XXX 0000–0999Assigned ONVOY, LLC - AZ 630E TUCSON AZ
2023-06-22 520-675-1XXX 1000–1999Assigned ONVOY, LLC - AZ 630E TUCSON AZ
2023-06-22 520-675-2XXX 2000–2999Assigned ONVOY, LLC - AZ 630E TUCSON AZ
2023-06-22 520-675-3XXX 3000–3999Assigned ONVOY, LLC - AZ 630E TUCSON AZ
2023-06-22 520-675-4XXX 4000–4999Assigned ONVOY, LLC - AZ 630E TUCSON AZ
2023-06-22 520-675-5XXX 5000–5999Assigned ONVOY, LLC - AZ 630E TUCSON AZ
2023-06-22 520-675-6XXX 6000–6999Assigned ONVOY, LLC - AZ 630E TUCSON AZ
2023-06-22 520-675-7XXX 7000–7999Assigned ONVOY, LLC - AZ 630E TUCSON AZ
2023-06-22 520-677-1XXX 1000–1999Assigned ONVOY, LLC - AZ 630E CASAGRANDE AZ
2023-06-22 520-677-2XXX 2000–2999Assigned ONVOY, LLC - AZ 630E CASAGRANDE AZ
2023-06-22 520-677-3XXX 3000–3999Assigned ONVOY, LLC - AZ 630E CASAGRANDE AZ
2023-06-22 520-677-4XXX 4000–4999Assigned ONVOY, LLC - AZ 630E CASAGRANDE AZ
2023-06-22 520-677-5XXX 5000–5999Assigned ONVOY, LLC - AZ 630E CASAGRANDE AZ
2023-06-22 520-679-1XXX 1000–1999Assigned ONVOY, LLC - AZ 630E TOMBSTONE AZ
2023-06-22 520-680-3XXX 3000–3999Assigned ONVOY, LLC - AZ 630E BISBEE AZ
2023-06-13 520-641-7XXX 7000–7999Assigned PEERLESS NETWORK OF ARIZONA, LLC - AZ 579F BENSON AZ
2023-06-13 520-657-5XXX 5000–5999Assigned PEERLESS NETWORK OF ARIZONA, LLC - AZ 579F HAYDEN AZ
2023-06-13 520-677-7XXX 7000–7999Assigned PEERLESS NETWORK OF ARIZONA, LLC - AZ 579F CASAGRANDE AZ
2023-06-08 520-667-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 TUCSON AZ
2023-06-08 520-667-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 TUCSON AZ
2023-06-08 520-667-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 TUCSON AZ
2023-06-08 520-667-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 TUCSON AZ
2023-06-08 520-667-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 TUCSON AZ
2023-06-08 520-667-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 TUCSON 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.