K4ISO
Active1x3District 4
Competitive callsign — 1 application filed with the FCC.
License HolderMiller, Christopher A
License ClassGeneral
Min. Class RequiredGeneral
LocationCanton, GA
Grant DateDec 20, 2025
Expiration DateOct 23, 2035
K4ISO is a highly sought-after 1x3 format amateur radio callsign. The license is currently held by Miller, Christopher A in Canton, 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 Miller, Christopher A on Oct 5, 2015. K4ISO has 5 recorded FCC license history events.
CW & Voice Analysis
Morse Code
-.- ....- .. ... ---
CW Weight: 28 units(Light (fast to send))
Voice Phonetics
Kilo Four India Sierra Oscar
Readability: 7/10(Good readability)
License History
- License RenewedDec 20, 2025
- License ModifiedMay 28, 2025
- Administrative Update AppliedMay 24, 2025
- License IssuedOct 23, 2015
- Vanity Callsign GrantedOct 23, 2015
Vanity Application Activity
Competing applications filed with the FCC for this callsign.
- Miller, Christopher AFiled Oct 5, 2015Not awardedFCC ↗