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
2008-05-22 480-455-3XXX 3000–3999Assigned LEVEL 3 TELECOM OF ARIZONA, LLC - AZ 7552 PHOENIX AZ
2008-05-22 480-455-4XXX 4000–4999Assigned LEVEL 3 TELECOM OF ARIZONA, LLC - AZ 7552 PHOENIX AZ
2008-05-22 480-455-5XXX 5000–5999Assigned LEVEL 3 TELECOM OF ARIZONA, LLC - AZ 7552 PHOENIX AZ
2008-05-19 480-270-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 PHOENIX AZ
2008-05-14 480-319-9XXX 9000–9999Assigned ONVOY, LLC - AZ 630E PHOENIX AZ
2008-05-06 480-463-2XXX 2000–2999Assigned QWEST CORPORATION 9636 PHOENIX AZ
2008-05-06 480-463-8XXX 8000–8999Assigned QWEST CORPORATION 9636 PHOENIX AZ
2008-05-02 480-433-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 PHOENIX AZ
2008-05-02 480-433-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 PHOENIX AZ
2008-05-02 480-433-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 PHOENIX AZ
2008-05-02 480-433-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 PHOENIX AZ
2008-05-02 480-433-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 PHOENIX AZ
2008-05-02 480-433-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 PHOENIX AZ
2008-05-02 480-433-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 PHOENIX AZ
2008-05-02 480-433-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 PHOENIX AZ
2008-05-02 480-433-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 PHOENIX AZ
2008-04-22 480-319-6XXX 6000–6999Assigned ONVOY, LLC - AZ 630E PHOENIX AZ
2008-04-22 480-319-7XXX 7000–7999Assigned ONVOY, LLC - AZ 630E PHOENIX AZ
2008-04-22 480-319-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PHOENIX AZ
2008-04-17 480-270-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 PHOENIX AZ
2008-04-17 480-291-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 PHOENIX AZ
2008-04-17 480-291-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 PHOENIX AZ
2008-04-17 480-291-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 PHOENIX AZ
2008-04-17 480-389-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 PHOENIX AZ
2008-04-17 480-389-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 PHOENIX AZ
2008-04-17 480-389-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 PHOENIX AZ
2008-04-17 480-440-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 PHOENIX AZ
2008-04-17 480-440-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 PHOENIX AZ
2008-04-14 480-264-1XXX 1000–1999Assigned ONVOY, LLC - AZ 630E PHOENIX AZ
2008-04-14 480-264-8XXX 8000–8999Assigned ONVOY, LLC - AZ 630E PHOENIX AZ
2008-04-14 480-264-9XXX 9000–9999Assigned ONVOY, LLC - AZ 630E PHOENIX AZ
2008-04-03 480-389-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 PHOENIX AZ
2008-04-03 480-389-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 PHOENIX AZ
2008-04-03 480-389-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 PHOENIX AZ
2008-04-01 480-559-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 PHOENIX AZ
2008-04-01 480-559-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 PHOENIX AZ
2008-03-27 480-270-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PHOENIX AZ
2008-03-27 480-270-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PHOENIX AZ
2008-03-20 480-559-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PHOENIX AZ
2008-03-06 480-264-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 PHOENIX AZ
2008-03-03 480-559-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 PHOENIX AZ
2008-03-03 480-559-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 PHOENIX AZ
2008-02-22 480-264-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J PHOENIX AZ
2008-02-22 480-264-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J PHOENIX AZ
2008-02-22 480-264-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J PHOENIX AZ
2008-02-22 480-264-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J PHOENIX AZ
2008-02-22 480-264-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J PHOENIX AZ
2008-02-22 480-264-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J PHOENIX AZ
2008-02-15 480-440-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 PHOENIX AZ
2008-02-15 480-440-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 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.