KO4JAY
Cancelled2x3District 4
Competitive callsign — 1 application filed with the FCC.
License HolderCullinane, Sara M
License ClassTechnician
Min. Class RequiredTechnician
LocationSouth Pasadena, CA
Grant DateNov 12, 2020
Cancellation DateApr 29, 2025
Available for ApplicationsApr 30, 2027
KO4JAY is a highly sought-after 2x3 format amateur radio callsign. The license is currently held by Cullinane, Sara M in South Pasadena, CA. 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 ROSSI, JAY E on Feb 25, 2021. KO4JAY has 6 recorded FCC license history events.
CW & Voice Analysis
Morse Code
-.- --- ....- .--- .- -.--
CW Weight: 47 units(Heavy (slower to send))
Voice Phonetics
Kilo Oscar Four Juliet Alpha Yankee
Readability: 7/10(Good readability)
Available Apr 30, 2027 (237 days remaining)
Requires Technician license or higher to apply for this callsign format (2x3).
License History
- License CanceledApr 29, 2025
- Administrative Update AppliedApr 11, 2025
- License ModifiedApr 1, 2025
- License ModifiedOct 5, 2021
- System-Generated GrantNov 12, 2020
- License IssuedNov 12, 2020
Vanity Application Activity
Competing applications filed with the FCC for this callsign.
- ROSSI, JAY EFiled Feb 25, 2021DismissedFCC ↗