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K9CAO

Active1x3District 9

Competitive callsign — 2 applications filed with the FCC.

License HolderCao, Lei

License ClassTechnician

Min. Class RequiredGeneral

LocationFountain Hills, AZ

Grant DateJan 7, 2023

Expiration DateJan 7, 2033

K9CAO is a highly sought-after 1x3 format amateur radio callsign. The license is currently held by Cao, Lei in Fountain Hills, AZ. This callsign has attracted significant interest in the amateur radio community, with 2 vanity applications filed with the FCC. The most recent was submitted by Cao, Lei on Dec 20, 2022. K9CAO has 3 recorded FCC license history events.

CW & Voice Analysis

Morse Code

-.- ----. -.-. .- ---

CW Weight: 41 units(Heavy (slower to send))

Voice Phonetics

Kilo Nine Charlie Alpha Oscar

Readability: 8/10(High readability)

License History

Administrative Update AppliedJul 22, 2025
License IssuedJan 7, 2023
Vanity Callsign GrantedJan 7, 2023

Vanity Application Activity

Competing applications filed with the FCC for this callsign.

Cao, LeiFiled Dec 20, 2022
Not awardedFCC ↗
Cao, LeiFiled Dec 1, 2022
DismissedFCC ↗

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FCC data as of Jul 31, 2026

K9CAO FCC Vanity Status: 2 Competing Applications & History