K4OSR
Active1x3District 4
Competitive callsign — 1 application filed with the FCC.
License HolderRoldan, Ernest A
License ClassGeneral
Min. Class RequiredGeneral
LocationDENVER, CO
Grant DateJan 3, 2020
Expiration DateJan 3, 2030
K4OSR is a highly sought-after 1x3 format amateur radio callsign. The license is currently held by Roldan, Ernest A in DENVER, CO. 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 Roldan, Ernest A on Dec 16, 2019. K4OSR has 4 recorded FCC license history events.
CW & Voice Analysis
Morse Code
-.- ....- --- ... .-.
CW Weight: 31 units(Moderate)
Voice Phonetics
Kilo Four Oscar Sierra Romeo
Readability: 7/10(Good readability)
License History
- License ModifiedJun 1, 2020
- License IssuedJan 3, 2020
- Vanity Callsign GrantedJan 3, 2020
- License ExpiredAug 18, 2005
Vanity Application Activity
Competing applications filed with the FCC for this callsign.
- Roldan, Ernest AFiled Dec 16, 2019Not awardedFCC ↗