K4SJC
Active1x3District 4
Competitive callsign — 1 application filed with the FCC.
License HolderJohns, Robert H
License ClassAdvanced
Min. Class RequiredGeneral
LocationBryn Athyn, PA
Grant DateSep 27, 2025
Expiration DateDec 8, 2035
K4SJC is a highly sought-after 1x3 format amateur radio callsign. The license is currently held by Johns, Robert H in Bryn Athyn, PA. 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 CLAYTON, STEVEN J on Nov 19, 2015. K4SJC has 6 recorded FCC license history events.
CW & Voice Analysis
Morse Code
-.- ....- ... .--- -.-.
CW Weight: 35 units(Moderate)
Voice Phonetics
Kilo Four Sierra Juliet Charlie
Readability: 7/10(Good readability)
License History
- License RenewedSep 27, 2025
- Administrative Update AppliedNov 23, 2017
- License IssuedDec 8, 2015
- Vanity Callsign GrantedDec 8, 2015
- License ExpiredApr 21, 2015
- License RenewedMar 1, 2003
Vanity Application Activity
Competing applications filed with the FCC for this callsign.
- CLAYTON, STEVEN JFiled Nov 19, 2015Not awardedFCC ↗