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
2023-12-07 520-602-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 TUCSON AZ
2023-12-07 520-697-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 TUCSON AZ
2023-11-20 520-602-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - AZ 7217 TUCSON AZ
2023-11-09 520-683-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CASAGRANDE AZ
2023-11-09 520-683-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CASAGRANDE AZ
2023-11-09 520-701-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CASAGRANDE AZ
2023-11-03 520-681-2XXX 2000–2999Assigned NUSO, LLC 732J NOGALES AZ
2023-11-01 520-220-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 SIERRAVIST AZ
2023-10-19 520-683-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 CASAGRANDE AZ
2023-10-19 520-683-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 CASAGRANDE AZ
2023-10-18 520-698-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 WILLCOX AZ
2023-10-18 520-698-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 WILLCOX AZ
2023-10-18 520-698-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 WILLCOX AZ
2023-10-11 520-681-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 NOGALES AZ
2023-10-03 520-697-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - AZ 7217 TUCSON AZ
2023-10-01 520-517-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 SACATON AZ
2023-10-01 520-517-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 SACATON AZ
2023-09-28 520-683-0XXX 0000–0999Assigned ONVOY SPECTRUM, LLC 624H CASAGRANDE AZ
2023-09-28 520-683-1XXX 1000–1999Assigned ONVOY SPECTRUM, LLC 624H CASAGRANDE AZ
2023-09-28 520-683-2XXX 2000–2999Assigned ONVOY SPECTRUM, LLC 624H CASAGRANDE AZ
2023-09-28 520-683-8XXX 8000–8999Assigned ONVOY SPECTRUM, LLC 624H CASAGRANDE AZ
2023-09-28 520-683-9XXX 9000–9999Assigned ONVOY SPECTRUM, LLC 624H CASAGRANDE AZ
2023-09-21 520-680-9XXX 9000–9999Assigned PEERLESS NETWORK OF ARIZONA, LLC - AZ 579F BISBEE AZ
2023-09-15 520-652-3XXX 3000–3999Assigned ONVOY, LLC - AZ 630E WHITLOW AZ
2023-09-15 520-657-3XXX 3000–3999Assigned ONVOY, LLC - AZ 630E HAYDEN AZ
2023-09-15 520-657-4XXX 4000–4999Assigned ONVOY, LLC - AZ 630E HAYDEN AZ
2023-09-06 520-697-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 TUCSON AZ
2023-09-06 520-697-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 TUCSON AZ
2023-09-06 520-697-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 TUCSON AZ
2023-09-06 520-697-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 TUCSON AZ
2023-09-06 520-697-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 TUCSON AZ
2023-09-06 520-697-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 TUCSON AZ
2023-09-06 520-697-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 TUCSON AZ
2023-08-31 520-684-0XXX 0000–0999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AZ 7465 SIERRAVIST AZ
2023-08-31 520-684-1XXX 1000–1999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AZ 7465 SIERRAVIST AZ
2023-08-31 520-684-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AZ 7465 SIERRAVIST AZ
2023-08-31 520-684-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AZ 7465 SIERRAVIST AZ
2023-08-31 520-684-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AZ 7465 SIERRAVIST AZ
2023-08-31 520-684-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AZ 7465 SIERRAVIST AZ
2023-08-31 520-684-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AZ 7465 SIERRAVIST AZ
2023-08-31 520-684-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AZ 7465 SIERRAVIST AZ
2023-08-31 520-684-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AZ 7465 SIERRAVIST AZ
2023-08-31 520-684-9XXX 9000–9999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AZ 7465 SIERRAVIST AZ
2023-08-31 520-687-0XXX 0000–0999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AZ 7465 SIERRAVIST AZ
2023-08-31 520-687-1XXX 1000–1999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AZ 7465 SIERRAVIST AZ
2023-08-31 520-687-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AZ 7465 SIERRAVIST AZ
2023-08-31 520-687-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AZ 7465 SIERRAVIST AZ
2023-08-31 520-687-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AZ 7465 SIERRAVIST AZ
2023-08-31 520-687-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AZ 7465 SIERRAVIST AZ
2023-08-31 520-687-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AZ 7465 SIERRAVIST 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.