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
2011-02-22 480-525-0XXX 0000–0999Assigned ONVOY, LLC - AZ 630E PHOENIX AZ
2011-02-22 480-525-1XXX 1000–1999Assigned ONVOY, LLC - AZ 630E PHOENIX AZ
2011-02-22 480-525-2XXX 2000–2999Assigned ONVOY, LLC - AZ 630E PHOENIX AZ
2011-02-22 480-525-3XXX 3000–3999Assigned ONVOY, LLC - AZ 630E PHOENIX AZ
2011-02-16 480-499-0XXX 0000–0999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PHOENIX AZ
2011-02-16 480-499-1XXX 1000–1999Assigned ONVOY, LLC - AZ 630E PHOENIX AZ
2011-02-16 480-499-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PHOENIX AZ
2011-02-16 480-499-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PHOENIX AZ
2011-02-16 480-499-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PHOENIX AZ
2011-02-16 480-499-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PHOENIX AZ
2011-02-16 480-499-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PHOENIX AZ
2011-02-16 480-499-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PHOENIX AZ
2011-02-16 480-499-9XXX 9000–9999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PHOENIX AZ
2011-02-10 480-285-0XXX 0000–0999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PHOENIX AZ
2011-02-10 480-646-9XXX 9000–9999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PHOENIX AZ
2011-02-07 480-646-5XXX 5000–5999Assigned LEVEL 3 TELECOM OF ARIZONA, LLC - AZ 7552 PHOENIX AZ
2011-01-31 480-359-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 PHOENIX AZ
2011-01-31 480-359-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 PHOENIX AZ
2011-01-31 480-512-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 PHOENIX AZ
2011-01-31 480-512-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 PHOENIX AZ
2011-01-31 480-646-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 PHOENIX AZ
2011-01-31 480-646-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 PHOENIX AZ
2011-01-18 480-359-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F PHOENIX AZ
2011-01-18 480-359-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F PHOENIX AZ
2011-01-18 480-359-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F PHOENIX AZ
2011-01-18 480-359-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F PHOENIX AZ
2011-01-18 480-359-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F PHOENIX AZ
2011-01-18 480-359-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F PHOENIX AZ
2011-01-18 480-359-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F PHOENIX AZ
2011-01-14 480-427-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PHOENIX AZ
2011-01-14 480-427-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PHOENIX AZ
2011-01-14 480-427-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PHOENIX AZ
2011-01-14 480-427-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PHOENIX AZ
2011-01-14 480-427-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PHOENIX AZ
2011-01-14 480-427-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PHOENIX AZ
2011-01-14 480-428-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PHOENIX AZ
2011-01-14 480-437-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PHOENIX AZ
2011-01-14 480-745-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PHOENIX AZ
2011-01-05 480-427-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J PHOENIX AZ
2011-01-05 480-427-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J PHOENIX AZ
2011-01-05 480-427-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J PHOENIX AZ
2010-12-29 480-646-1XXX 1000–1999Assigned MCC TELEPHONY LLC 593K PHOENIX AZ
2010-11-22 480-428-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PHOENIX AZ
2010-11-15 480-428-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J PHOENIX AZ
2010-10-27 480-427-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F PHOENIX AZ
2010-10-07 480-428-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 PHOENIX AZ
2010-10-07 480-428-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 PHOENIX AZ
2010-10-07 480-428-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 PHOENIX AZ
2010-10-07 480-428-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 PHOENIX AZ
2010-10-07 480-428-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 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.