K1SJ
Active1x2District 1
Competitive callsign — 20 applications filed with the FCC.
License HolderGerard, Christophe J
License ClassAmateur Extra
Min. Class RequiredAmateur Extra
LocationArlington, MA
Grant DateAug 19, 2022
Expiration DateAug 19, 2032
K1SJ is a highly sought-after 1x2 format amateur radio callsign. The license is currently held by Gerard, Christophe J in Arlington, MA. This callsign has attracted significant interest in the amateur radio community, with 20 vanity applications filed with the FCC. The most recent was submitted by John, Scott W on Sep 3, 2025. K1SJ has 9 recorded FCC license history events.
CW & Voice Analysis
Morse Code
-.- .---- ... .---
CW Weight: 33 units(Moderate)
Voice Phonetics
Kilo One Sierra Juliet
Readability: 7.5/10(High readability)
License History
- Vanity Callsign GrantedAug 19, 2022
- License IssuedAug 19, 2022
- License ExpiredJul 1, 2022
- Administrative Update AppliedMay 29, 2012
- License RenewedApr 24, 2010
- Administrative Update AppliedSep 7, 2005
- Administrative Update AppliedJun 19, 2002
- License IssuedJun 30, 2000
- License ExpiredSep 1, 1999
Vanity Application Activity
Competing applications filed with the FCC for this callsign.