K4AOL
Active1x3District 4
Competitive callsign — 2 applications filed with the FCC.
License HolderROSAS, DENNIS N
License ClassTechnician
Min. Class RequiredGeneral
LocationColorado Springs, CO
Grant DateDec 3, 2025
Expiration DateFeb 2, 2036
K4AOL is a highly sought-after 1x3 format amateur radio callsign. The license is currently held by ROSAS, DENNIS N in Colorado Springs, CO. 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 Boyes, Michael R on Jan 14, 2016. K4AOL has 7 recorded FCC license history events.
CW & Voice Analysis
Morse Code
-.- ....- .- --- .-..
CW Weight: 33 units(Moderate)
Voice Phonetics
Kilo Four Alpha Oscar Lima
Readability: 8/10(High readability)
License History
- Administrative Update AppliedJan 27, 2026
- License RenewedDec 3, 2025
- Administrative Update AppliedNov 27, 2025
- Vanity Callsign GrantedFeb 2, 2016
- License IssuedFeb 2, 2016
- License ExpiredJul 1, 2007
- FRN Association Letter SentJul 18, 2005
Vanity Application Activity
Competing applications filed with the FCC for this callsign.