KR4PTO
Active2x3District 4
Competitive callsign — 1 application filed with the FCC.
License HolderWu, Yao-Fei
License ClassTechnician
Min. Class RequiredTechnician
LocationAtlanta, GA
Grant DateOct 21, 2026
Expiration DateOct 21, 2036
KR4PTO is a highly sought-after 2x3 format amateur radio callsign. The license is currently held by Wu, Yao-Fei in Atlanta, GA. This callsign has attracted significant interest in the amateur radio community, with 1 vanity application filed with the FCC. The most recent was submitted by Young, Robert on Feb 19, 2026. KR4PTO has 3 recorded FCC license history events.
CW & Voice Analysis
Morse Code
-.- .-. ....- .--. - ---
CW Weight: 39 units(Moderate)
Voice Phonetics
Kilo Romeo Four Papa Tango Oscar
Readability: 7/10(Good readability)
License History
- Administrative Update AppliedOct 22, 2026
- System-Generated GrantOct 21, 2026
- License IssuedOct 21, 2026
Vanity Application Activity
Competing applications filed with the FCC for this callsign.
- Young, RobertFiled Feb 19, 2026Not awardedFCC ↗