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
2022-04-12 520-590-8XXX 8000–8999Assigned IP HORIZON LLC 515J BISBEE AZ
2022-04-06 520-614-0XXX 0000–0999Assigned ONVOY, LLC - AZ 630E TUCSON AZ
2022-04-06 520-614-1XXX 1000–1999Assigned ONVOY, LLC - AZ 630E TUCSON AZ
2022-04-06 520-650-2XXX 2000–2999Assigned ONVOY, LLC - AZ 630E WHITLOW AZ
2022-04-06 520-652-4XXX 4000–4999Assigned ONVOY, LLC - AZ 630E WHITLOW AZ
2022-03-31 520-455-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 NOGALES AZ
2022-03-31 520-619-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 NOGALES AZ
2022-03-31 520-924-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 NOGALES AZ
2022-03-28 520-643-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 WILLCOX AZ
2022-03-28 520-643-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 WILLCOX AZ
2022-03-28 520-643-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 WILLCOX AZ
2022-03-28 520-643-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 WILLCOX AZ
2022-03-28 520-643-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 WILLCOX AZ
2022-03-28 520-643-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 WILLCOX AZ
2022-03-28 520-643-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 WILLCOX AZ
2022-03-28 520-929-0XXX 0000–0999Assigned TELNYX LLC 073H WILLCOX AZ
2022-03-14 520-702-0XXX 0000–0999Assigned TON80 COMMUNICATIONS, LLC 516J DOUGLAS AZ
2022-03-10 520-634-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 CASAGRANDE AZ
2022-03-10 520-634-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 CASAGRANDE AZ
2022-03-10 520-634-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 CASAGRANDE AZ
2022-03-10 520-634-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CASAGRANDE AZ
2022-03-10 520-634-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CASAGRANDE AZ
2022-03-10 520-634-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 CASAGRANDE AZ
2022-03-10 520-634-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CASAGRANDE AZ
2022-03-09 520-607-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 CASAGRANDE AZ
2022-03-09 520-607-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 CASAGRANDE AZ
2022-03-09 520-607-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 CASAGRANDE AZ
2022-03-08 520-607-5XXX 5000–5999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - AZ 7217 CASAGRANDE AZ
2022-03-08 520-699-6XXX 6000–6999Assigned TON80 COMMUNICATIONS, LLC 516J SIERRAVIST AZ
2022-03-03 520-614-9XXX 9000–9999Assigned PEERLESS NETWORK OF ARIZONA, LLC - AZ 579F TUCSON AZ
2022-03-03 520-699-7XXX 7000–7999Assigned PEERLESS NETWORK OF ARIZONA, LLC - AZ 579F SIERRAVIST AZ
2022-03-01 520-614-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 TUCSON AZ
2022-03-01 520-652-2XXX 2000–2999Assigned QWEST CORPORATION 9636 WHITLOW AZ
2022-02-25 520-641-1XXX 1000–1999Assigned PEERLESS NETWORK OF ARIZONA, LLC - AZ 579F BENSON AZ
2022-02-24 520-614-2XXX 2000–2999Assigned ONVOY, LLC - AZ 630E TUCSON AZ
2022-02-24 520-614-3XXX 3000–3999Assigned ONVOY, LLC - AZ 630E TUCSON AZ
2022-02-24 520-614-4XXX 4000–4999Assigned ONVOY, LLC - AZ 630E TUCSON AZ
2022-02-24 520-614-5XXX 5000–5999Assigned ONVOY, LLC - AZ 630E TUCSON AZ
2022-02-24 520-614-7XXX 7000–7999Assigned ONVOY, LLC - AZ 630E TUCSON AZ
2022-02-24 520-614-8XXX 8000–8999Assigned ONVOY, LLC - AZ 630E TUCSON AZ
2022-02-24 520-641-0XXX 0000–0999Assigned TELNYX LLC 073H BENSON AZ
2022-02-24 520-929-7XXX 7000–7999Assigned ONVOY, LLC - AZ 630E WILLCOX AZ
2022-02-24 520-929-8XXX 8000–8999Assigned ONVOY, LLC - AZ 630E WILLCOX AZ
2022-02-24 520-994-8XXX 8000–8999Assigned ONVOY, LLC - AZ 630E SASABE AZ
2022-02-18 520-581-6XXX 6000–6999Assigned PEERLESS NETWORK OF ARIZONA, LLC - AZ 579F TOMBSTONE AZ
2022-02-18 520-590-9XXX 9000–9999Assigned PEERLESS NETWORK OF ARIZONA, LLC - AZ 579F BISBEE AZ
2022-02-18 520-607-6XXX 6000–6999Assigned PEERLESS NETWORK OF ARIZONA, LLC - AZ 579F CASAGRANDE AZ
2022-02-18 520-608-9XXX 9000–9999Assigned PEERLESS NETWORK OF ARIZONA, LLC - AZ 579F SAN MANUEL AZ
2022-02-18 520-641-6XXX 6000–6999Assigned TON80 COMMUNICATIONS, LLC 516J BENSON AZ
2022-02-18 520-646-4XXX 4000–4999Assigned TON80 COMMUNICATIONS, LLC 516J NOGALES 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.