NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

1 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 480
TELEPORT COMMUNICATIONS AMERICA, LLC - AZ 1
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
2014-04-01 480-739-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PHOENIX AZ
2014-03-27 480-387-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PHOENIX AZ
2014-03-27 480-387-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PHOENIX AZ
2014-03-27 480-387-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PHOENIX AZ
2014-03-25 480-738-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 PHOENIX AZ
2014-03-25 480-738-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 PHOENIX AZ
2014-03-25 480-738-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 PHOENIX AZ
2014-03-25 480-738-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 PHOENIX AZ
2014-03-25 480-738-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 PHOENIX AZ
2014-03-25 480-738-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 PHOENIX AZ
2014-03-25 480-738-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 PHOENIX AZ
2014-03-25 480-758-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 PHOENIX AZ
2014-03-25 480-758-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 PHOENIX AZ
2014-03-25 480-825-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 PHOENIX AZ
2014-03-25 480-825-9XXX 9000–9999Assigned METROPCS, INC. 5562 PHOENIX AZ
2014-03-25 480-842-0XXX 0000–0999Assigned METROPCS, INC. 5562 PHOENIX AZ
2014-02-24 480-826-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 PHOENIX AZ
2014-02-24 480-826-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 PHOENIX AZ
2014-02-24 480-826-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 PHOENIX AZ
2014-02-24 480-826-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 PHOENIX AZ
2014-02-24 480-826-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 PHOENIX AZ
2014-02-24 480-826-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 PHOENIX AZ
2014-02-24 480-826-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 PHOENIX AZ
2014-02-24 480-826-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 PHOENIX AZ
2014-02-24 480-826-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 PHOENIX AZ
2014-02-24 480-826-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 PHOENIX AZ
2014-02-20 480-738-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - AZ 7217 PHOENIX AZ
2014-02-20 480-758-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PHOENIX AZ
2014-02-20 480-758-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PHOENIX AZ
2014-02-20 480-758-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PHOENIX AZ
2014-02-20 480-758-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PHOENIX AZ
2014-02-20 480-848-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 PHOENIX AZ
2014-02-20 480-848-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 PHOENIX AZ
2014-02-20 480-848-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 PHOENIX AZ
2014-02-20 480-848-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 PHOENIX AZ
2014-02-20 480-848-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 PHOENIX AZ
2014-02-20 480-848-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 PHOENIX AZ
2014-02-20 480-848-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 PHOENIX AZ
2014-02-20 480-848-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 PHOENIX AZ
2014-02-20 480-848-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 PHOENIX AZ
2014-02-20 480-848-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 PHOENIX AZ
2014-02-19 480-758-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PHOENIX AZ
2014-02-05 480-387-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J PHOENIX AZ
2014-01-28 480-434-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 PHOENIX AZ
2014-01-28 480-434-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 PHOENIX AZ
2014-01-28 480-434-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 PHOENIX AZ
2014-01-28 480-434-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 PHOENIX AZ
2014-01-28 480-434-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 PHOENIX AZ
2014-01-28 480-434-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 PHOENIX AZ
2014-01-28 480-434-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 PHOENIX 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.