W1SJM
Active1x3District 1
Competitive callsign — 1 application filed with the FCC.
License HolderMattern, Stephen J
License ClassGeneral
Min. Class RequiredGeneral
LocationPlymouth, MA
Grant DateSep 11, 2025
Expiration DateSep 11, 2035
W1SJM is a highly sought-after 1x3 format amateur radio callsign. The license is currently held by Mattern, Stephen J in Plymouth, MA. 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 Mattern, Stephen J on Jan 22, 2014. W1SJM has 4 recorded FCC license history events.
CW & Voice Analysis
Morse Code
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CW Weight: 39 units(Moderate)
Voice Phonetics
Whiskey One Sierra Juliet Mike
Readability: 7.5/10(High readability)
License History
- License RenewedSep 11, 2025
- License IssuedFeb 11, 2014
- Vanity Callsign GrantedFeb 11, 2014
- License ExpiredJun 3, 2007
Vanity Application Activity
Competing applications filed with the FCC for this callsign.
- Mattern, Stephen JFiled Jan 22, 2014Not awardedFCC ↗