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
2021-08-25 602-834 0–9 XXXwhole prefix which blocks → BANDWIDTH.COM CLEC, LLC - AZ 587F PHOENIX AZ
2021-08-19 602-816 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 PHOENIX AZ
2021-07-07 602-844 0–9 XXXwhole prefix which blocks → ONVOY, LLC - AZ 630E PHOENIX AZ
2021-07-01 602-807 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 PHOENIX AZ
2021-05-27 602-815 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 PHOENIX AZ
2021-05-26 602-813 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - AZ 587F PHOENIX AZ
2021-04-30 602-805 0–9 XXXall 10 · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 PHOENIX AZ
2021-04-21 602-887 0–9 XXXwhole prefix which blocks → ONVOY, LLC - AZ 630E PHOENIX AZ
2021-03-31 602-855 0–9 XXXall 10 · 4 holders which blocks → COMCAST IP PHONE, LLC 318J PHOENIX AZ
2021-03-25 602-837 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 PHOENIX AZ
2021-03-05 602-804 0–9 XXXall 10 · 3 holders which blocks → TELNYX LLC 073H PHOENIX AZ
2021-03-05 602-860 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - AZ 630E PHOENIX AZ
2021-02-10 602-706 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 PHOENIX AZ
2021-02-04 602-830 0–9 XXXwhole prefix which blocks → BANDWIDTH.COM CLEC, LLC - AZ 587F PHOENIX AZ
2021-01-08 602-784 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 PHOENIX AZ
2020-11-30 602-960 0–9 XXXwhole prefix which blocks → ONVOY, LLC - AZ 630E PHOENIX AZ
2020-11-09 602-922 0–9 XXXwhole prefix which blocks → ONVOY, LLC - AZ 630E PHOENIX AZ
2020-11-03 602-767 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - AZ 587F PHOENIX AZ
2020-10-29 602-756 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 PHOENIX AZ
2020-09-24 602-946 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H PHOENIX AZ
2020-09-21 602-742 0–9 XXXall 10 · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 PHOENIX AZ
2020-08-20 602-731 0–9 XXXall 10 · 2 holders which blocks → METROPCS, INC. 5562 PHOENIX AZ
2020-08-03 602-727 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 PHOENIX AZ
2020-07-14 602-755 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H PHOENIX AZ
2020-06-25 602-780 0–9 XXXall 10 · 2 holders which blocks → ONVOY SPECTRUM, LLC 624H PHOENIX AZ
2020-06-19 602-704 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - AZ 587F PHOENIX AZ
2020-05-08 602-693 0–9 XXXall 10 · 3 holders which blocks → HD CARRIER LLC 321J PHOENIX AZ
2020-05-07 602-671 0–9 XXXall 10 · 4 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J PHOENIX AZ
2020-03-05 602-654 0–9 XXXall 10 · 2 holders which blocks → METROPCS, INC. 5562 PHOENIX AZ
2020-03-05 602-932 0–9 XXXwhole prefix which blocks → ONVOY, LLC - AZ 630E PHOENIX AZ
2020-02-20 602-806 0–9 XXXwhole prefix which blocks → ONVOY, LLC - AZ 630E PHOENIX AZ
2020-01-29 602-649 0–9 XXXall 10 · 2 holders which blocks → METROPCS, INC. 5562 PHOENIX AZ
2020-01-17 602-962 0–9 XXXwhole prefix which blocks → ONVOY, LLC - AZ 630E PHOENIX AZ
2019-12-17 602-580 0–9 XXXall 10 · 3 holders which blocks → HD CARRIER LLC 321J PHOENIX AZ
2019-11-19 602-902 0–9 XXXwhole prefix which blocks → ONVOY, LLC - AZ 630E PHOENIX AZ
2019-11-14 602-641 0–9 XXXall 10 · 3 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J PHOENIX AZ
2019-10-03 602-691 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 PHOENIX AZ
2019-09-13 602-877 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H PHOENIX AZ
2019-08-02 602-610 0–9 XXXwhole prefix which blocks → ONVOY, LLC - AZ 630E PHOENIX AZ
2019-06-10 602-609 0–9 XXXall 10 · 4 holders which blocks → HD CARRIER LLC 321J PHOENIX AZ
2019-05-31 602-661 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - AZ 587F PHOENIX AZ
2019-05-17 602-675 0–9 XXXall 10 · 2 holders which blocks → COMCAST IP PHONE, LLC 318J PHOENIX AZ
2019-03-21 602-584 0–9 XXXwhole prefix which blocks → ONVOY, LLC - AZ 630E PHOENIX AZ
2019-01-17 602-607 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - AZ 587F PHOENIX AZ
2019-01-14 602-581 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 PHOENIX AZ
2018-11-01 602-560 0–9 XXXwhole prefix which blocks → ONVOY, LLC - AZ 630E PHOENIX AZ
2018-10-04 602-563 0–9 XXXall 10 · 5 holders which blocks → AIRESPRING, INC. 996H PHOENIX AZ
2018-08-24 602-536 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - AZ 630E PHOENIX AZ
2018-06-25 602-857 0–9 XXXall 10 · 3 holders which blocks → ADVANCED TELECOM SOLUTIONS, LLC 181J PHOENIX AZ
2018-04-20 602-612 0–9 XXXall 10 · 7 holders which blocks → WIDE VOICE, LLC - AZ 410H 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.