K4RSM
Expired1x3District 4
Competitive callsign — 2 applications filed with the FCC.
License HolderWILLIAMSON, LAWRENCE E
License ClassGeneral
Min. Class RequiredGeneral
LocationJUPITER, FL
Grant DateAug 18, 2014
Expiration DateOct 24, 2024
Available for ApplicationsOct 25, 2026
K4RSM is a highly sought-after 1x3 format amateur radio callsign. The license is currently held by WILLIAMSON, LAWRENCE E in JUPITER, FL. This callsign has attracted significant interest in the amateur radio community, with 2 vanity applications filed with the FCC. The most recent was submitted by McCarthy, Richard S on Jun 6, 2016. K4RSM has 2 recorded FCC license history events.
CW & Voice Analysis
Morse Code
-.- ....- .-. ... --
CW Weight: 28 units(Light (fast to send))
Voice Phonetics
Kilo Four Romeo Sierra Mike
Readability: 7.5/10(High readability)
Available Oct 25, 2026 (51 days remaining)
Requires General license or higher to apply for this callsign format (1x3).
License History
- License RenewedAug 18, 2014
- FRN Association Letter SentSep 2, 2004
Vanity Application Activity
Competing applications filed with the FCC for this callsign.