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
2020-12-17 520-924-6XXX 6000–6999Assigned ONVOY, LLC - AZ 630E NOGALES AZ
2020-12-17 520-924-7XXX 7000–7999Assigned ONVOY, LLC - AZ 630E NOGALES AZ
2020-12-16 520-535-0XXX 0000–0999Assigned ONVOY, LLC - AZ 630E TUCSON AZ
2020-12-16 520-535-1XXX 1000–1999Assigned ONVOY, LLC - AZ 630E TUCSON AZ
2020-12-15 520-535-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 TUCSON AZ
2020-12-09 520-535-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 TUCSON AZ
2020-12-09 520-535-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 TUCSON AZ
2020-12-09 520-535-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 TUCSON AZ
2020-12-09 520-535-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 TUCSON AZ
2020-12-09 520-535-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 TUCSON AZ
2020-12-09 520-535-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 TUCSON AZ
2020-12-09 520-535-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 TUCSON AZ
2020-12-07 520-386-4XXX 4000–4999Assigned PEERLESS NETWORK OF ARIZONA, LLC - AZ 579F BENSON AZ
2020-12-07 520-453-9XXX 9000–9999Assigned PEERLESS NETWORK OF ARIZONA, LLC - AZ 579F TOMBSTONE AZ
2020-12-07 520-473-8XXX 8000–8999Assigned PEERLESS NETWORK OF ARIZONA, LLC - AZ 579F SIERRAVIST AZ
2020-12-07 520-650-0XXX 0000–0999Assigned PEERLESS NETWORK OF ARIZONA, LLC - AZ 579F WHITLOW AZ
2020-12-07 520-655-9XXX 9000–9999Assigned PEERLESS NETWORK OF ARIZONA, LLC - AZ 579F SUPERIOR AZ
2020-12-04 520-473-1XXX 1000–1999Assigned ONVOY, LLC - AZ 630E SIERRAVIST AZ
2020-12-04 520-473-2XXX 2000–2999Assigned ONVOY, LLC - AZ 630E SIERRAVIST AZ
2020-12-04 520-473-3XXX 3000–3999Assigned ONVOY, LLC - AZ 630E SIERRAVIST AZ
2020-12-04 520-473-4XXX 4000–4999Assigned ONVOY, LLC - AZ 630E SIERRAVIST AZ
2020-12-04 520-473-5XXX 5000–5999Assigned ONVOY, LLC - AZ 630E SIERRAVIST AZ
2020-12-01 520-521-1XXX 1000–1999Assigned TELNYX LLC 073H SAN MANUEL AZ
2020-11-24 520-473-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SIERRAVIST AZ
2020-11-19 520-246-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TUCSON AZ
2020-11-19 520-246-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TUCSON AZ
2020-11-19 520-246-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TUCSON AZ
2020-11-19 520-246-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TUCSON AZ
2020-11-19 520-246-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TUCSON AZ
2020-11-19 520-246-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TUCSON AZ
2020-11-19 520-246-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TUCSON AZ
2020-11-19 520-501-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TUCSON AZ
2020-11-19 520-501-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TUCSON AZ
2020-11-09 520-246-2XXX 2000–2999Assigned PEERLESS NETWORK OF ARIZONA, LLC - AZ 579F TUCSON AZ
2020-11-09 520-497-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TUCSON AZ
2020-11-09 520-497-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TUCSON AZ
2020-11-09 520-497-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TUCSON AZ
2020-11-09 520-501-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TUCSON AZ
2020-11-09 520-501-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TUCSON AZ
2020-11-09 520-501-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TUCSON AZ
2020-11-09 520-501-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TUCSON AZ
2020-11-09 520-501-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TUCSON AZ
2020-11-09 520-501-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TUCSON AZ
2020-11-09 520-501-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TUCSON AZ
2020-11-09 520-521-0XXX 0000–0999Assigned PEERLESS NETWORK OF ARIZONA, LLC - AZ 579F SAN MANUEL AZ
2020-11-09 520-525-1XXX 1000–1999Assigned PEERLESS NETWORK OF ARIZONA, LLC - AZ 579F BISBEE AZ
2020-11-09 520-980-9XXX 9000–9999Assigned PEERLESS NETWORK OF ARIZONA, LLC - AZ 579F NOGALES AZ
2020-11-05 520-993-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 SELLS AZ
2020-11-04 520-492-0XXX 0000–0999Assigned ONVOY, LLC - AZ 630E TUCSON AZ
2020-11-04 520-492-1XXX 1000–1999Assigned 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.