K4ROJ
Active1x3District 4
Competitive callsign — 4 applications filed with the FCC.
License HolderMendelson, Seth E
License ClassTechnician
Min. Class RequiredGeneral
LocationNorthborough, MA
Grant DateJul 23, 2022
Expiration DateJul 23, 2032
K4ROJ is a highly sought-after 1x3 format amateur radio callsign. The license is currently held by Mendelson, Seth E in Northborough, MA. This callsign has attracted significant interest in the amateur radio community, with 4 vanity applications filed with the FCC. The most recent was submitted by Rojas, Enrique on Jul 5, 2022. K4ROJ has 5 recorded FCC license history events.
CW & Voice Analysis
Morse Code
-.- ....- .-. --- .---
CW Weight: 38 units(Moderate)
Voice Phonetics
Kilo Four Romeo Oscar Juliet
Readability: 7/10(Good readability)
License History
- Administrative Update AppliedSep 9, 2025
- Administrative Update AppliedFeb 4, 2023
- License ModifiedOct 21, 2022
- License IssuedJul 23, 2022
- Vanity Callsign GrantedJul 23, 2022
Vanity Application Activity
Competing applications filed with the FCC for this callsign.