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
2022-01-14 520-702-4XXX 4000–4999Assigned ONVOY, LLC - AZ 630E DOUGLAS AZ
2022-01-14 520-772-2XXX 2000–2999Assigned TON80 COMMUNICATIONS, LLC 516J SUPERIOR AZ
2022-01-14 520-949-4XXX 4000–4999Assigned TON80 COMMUNICATIONS, LLC 516J SANTA ROSA AZ
2022-01-11 520-607-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CASAGRANDE AZ
2022-01-11 520-607-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 CASAGRANDE AZ
2022-01-11 520-632-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 CASAGRANDE AZ
2022-01-11 520-632-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 CASAGRANDE AZ
2022-01-11 520-632-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 CASAGRANDE AZ
2022-01-11 520-632-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CASAGRANDE AZ
2022-01-11 520-632-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CASAGRANDE AZ
2022-01-11 520-632-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CASAGRANDE AZ
2022-01-11 520-632-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 CASAGRANDE AZ
2022-01-11 520-632-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CASAGRANDE AZ
2022-01-09 520-633-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 TUCSON AZ
2022-01-09 520-633-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 TUCSON AZ
2022-01-09 520-633-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 TUCSON AZ
2022-01-09 520-633-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 TUCSON AZ
2022-01-09 520-633-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 TUCSON AZ
2022-01-09 520-633-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 TUCSON AZ
2022-01-09 520-633-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 TUCSON AZ
2022-01-09 520-633-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 TUCSON AZ
2022-01-09 520-633-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 TUCSON AZ
2022-01-09 520-633-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 TUCSON AZ
2022-01-07 520-613-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TUCSON AZ
2022-01-07 520-613-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TUCSON AZ
2022-01-07 520-613-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TUCSON AZ
2022-01-07 520-613-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TUCSON AZ
2021-12-28 520-699-8XXX 8000–8999Assigned PEERLESS NETWORK OF ARIZONA, LLC - AZ 579F SIERRAVIST AZ
2021-12-17 520-567-0XXX 0000–0999Assigned ONVOY, LLC - AZ 630E HAYDEN AZ
2021-12-17 520-601-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 SELLS AZ
2021-12-17 520-607-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 CASAGRANDE AZ
2021-12-15 520-563-0XXX 0000–0999Assigned ONVOY, LLC - AZ 630E BENSON AZ
2021-12-15 520-569-0XXX 0000–0999Assigned ONVOY, LLC - AZ 630E SAN MANUEL AZ
2021-12-15 520-569-4XXX 4000–4999Assigned ONVOY, LLC - AZ 630E SAN MANUEL AZ
2021-12-15 520-632-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 CASAGRANDE AZ
2021-12-15 520-632-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 CASAGRANDE AZ
2021-12-14 520-517-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 SACATON AZ
2021-12-06 520-264-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 NOGALES AZ
2021-12-06 520-264-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 NOGALES AZ
2021-12-06 520-264-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 NOGALES AZ
2021-12-06 520-375-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 NOGALES AZ
2021-12-02 520-630-2XXX 2000–2999Assigned ONVOY, LLC - AZ 630E WILLCOX AZ
2021-12-02 520-630-3XXX 3000–3999Assigned ONVOY, LLC - AZ 630E WILLCOX AZ
2021-12-02 520-630-4XXX 4000–4999Assigned ONVOY, LLC - AZ 630E WILLCOX AZ
2021-11-30 520-451-5XXX 5000–5999Assigned ONVOY, LLC - AZ 630E TUCSON AZ
2021-11-30 520-592-4XXX 4000–4999Assigned ONVOY, LLC - AZ 630E NOGALES AZ
2021-11-30 520-592-5XXX 5000–5999Assigned ONVOY, LLC - AZ 630E NOGALES AZ
2021-11-30 520-592-7XXX 7000–7999Assigned ONVOY, LLC - AZ 630E NOGALES AZ
2021-11-30 520-592-8XXX 8000–8999Assigned ONVOY, LLC - AZ 630E NOGALES AZ
2021-11-30 520-605-7XXX 7000–7999Assigned 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.