NumberResearch Membership · Data 09/20/2026

Recent prefix assignments

0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/20/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

The Code holder is who opened each NPA-NXX prefix — not necessarily who holds the numbers. A prefix is 10,000 numbers, but under pooling its ten 1,000-number blocks are handed out individually, often to different carriers; the code holder may hold only one block, or none. The Thousands-blocks column shows how the ten blocks are really split — click which blocks → to see who holds each 1,000-number block and its last-4-digit range. Assignments are initial assignments; the current serving carrier may differ due to portability.

Most active assignees, all time — NPA 602
QWEST CORPORATION 266
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 110
T-MOBILE USA, INC. 98
NEW CINGULAR WIRELESS PCS, LLC 48
ONVOY, LLC - AZ 33
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 NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2018-03-16 602-975 0–9 XXXall 10 · 5 holders which blocks → VONAGE AMERICA LLC 197D PHOENIX AZ
2018-03-07 602-907 0–9 XXXall 10 · 2 holders which blocks → METROPCS, INC. 5562 PHOENIX AZ
2018-02-13 602-825 0–9 XXXall 10 · 4 holders which blocks → COMCAST IP PHONE, LLC 318J PHOENIX AZ
2017-09-18 602-598 0–9 XXXall 10 · 5 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J PHOENIX AZ
2017-09-13 602-699 0–9 XXXall 10 · 2 holders which blocks → METROPCS, INC. 5562 PHOENIX AZ
2017-04-20 602-698 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - AZ 630E PHOENIX AZ
2017-01-16 602-601 0–9 XXXall 10 · 5 holders which blocks → WIDE VOICE, LLC - AZ 410H PHOENIX AZ
2016-12-08 602-583 0–9 XXXall 10 · 2 holders which blocks → METROPCS, INC. 5562 PHOENIX AZ
2016-10-10 602-782 0–9 XXXall 10 · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PHOENIX AZ
2016-09-08 602-775 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 PHOENIX AZ
2016-09-02 602-603 0–9 XXXall 10 · 4 holders which blocks → VONAGE AMERICA LLC 197D PHOENIX AZ
2016-06-27 602-632 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 PHOENIX AZ
2016-05-19 602-831 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - AZ 587F PHOENIX AZ
2016-04-21 602-517 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 PHOENIX AZ
2016-03-25 602-461 0–9 XXXall 10 · 2 holders which blocks → METROPCS, INC. 5562 PHOENIX AZ
2016-01-28 602-875 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - AZ 630E PHOENIX AZ
2016-01-27 602-668 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 PHOENIX AZ
2016-01-27 602-737 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - AZ 630E PHOENIX AZ
2015-11-12 602-833 0–9 XXXall 10 · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PHOENIX AZ
2015-09-03 602-585 0–9 XXXall 10 · 3 holders which blocks → INTRADO COMMUNICATIONS, LLC 890G PHOENIX AZ
2015-08-26 602-313 0–9 XXXall 10 · 5 holders which blocks → PAETEC ITEL, LLC 829J PHOENIX AZ
2015-08-25 602-491 0–9 XXXall 10 · 2 holders which blocks → PEERLESS NETWORK OF ARIZONA, LLC - AZ 579F PHOENIX AZ
2015-05-13 602-883 0–9 XXXall 10 · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PHOENIX AZ
2015-03-30 602-473 0–9 XXXwhole prefix which blocks → METROPCS, INC. 5562 PHOENIX AZ
2015-03-20 602-566 0–9 XXXall 10 · 5 holders which blocks → PAETEC ITEL, LLC 829J PHOENIX AZ
2015-03-16 602-497 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - AZ 630E PHOENIX AZ
2015-03-11 602-394 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 PHOENIX AZ
2014-12-23 602-554 0–9 XXXall 10 · 3 holders which blocks → INTRADO COMMUNICATIONS, LLC 890G PHOENIX AZ
2014-09-19 602-551 0–9 XXXall 10 · 2 holders which blocks → METROPCS, INC. 5562 PHOENIX AZ
2014-08-21 602-900 0–9 XXXall 10 · 6 holders which blocks → PEERLESS NETWORK OF ARIZONA, LLC - AZ 579F PHOENIX AZ
2014-07-29 602-783 0–9 XXXall 10 · 2 holders which blocks → METROPCS, INC. 5562 PHOENIX AZ
2014-06-30 602-483 0–9 XXXall 10 · 4 holders which blocks → PEERLESS NETWORK OF ARIZONA, LLC - AZ 579F PHOENIX AZ
2014-06-05 602-899 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - AZ 587F PHOENIX AZ
2014-03-28 602-802 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 PHOENIX AZ
2014-03-17 602-726 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - AZ 587F PHOENIX AZ
2014-02-28 602-892 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - AZ 630E PHOENIX AZ
2013-10-24 602-529 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - AZ 630E PHOENIX AZ
2013-02-27 602-545 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 PHOENIX AZ
2013-02-27 602-785 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 PHOENIX AZ
2013-02-27 602-921 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 PHOENIX AZ
2013-02-04 602-500 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - AZ 630E PHOENIX AZ
2013-01-25 602-582 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 PHOENIX AZ
2013-01-25 602-657 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 PHOENIX AZ
2013-01-21 602-812 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 PHOENIX AZ
2013-01-15 602-849 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 PHOENIX AZ
2012-11-05 602-600 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - AZ 630E PHOENIX AZ
2012-11-05 602-800 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - AZ 630E PHOENIX AZ
2012-11-02 602-642 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 PHOENIX AZ
2012-11-02 602-752 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 PHOENIX AZ
2012-10-19 602-736 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 PHOENIX AZ

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.