K4BRL
Active1x3District 4
Competitive callsign — 5 applications filed with the FCC.
License HolderNELSON, DONALD R
License ClassAmateur Extra
Min. Class RequiredGeneral
LocationBOULDER, CO
Grant DateMay 13, 2025
Expiration DateJul 3, 2035
K4BRL is a highly sought-after 1x3 format amateur radio callsign. The license is currently held by NELSON, DONALD R in BOULDER, CO. This callsign has attracted significant interest in the amateur radio community, with 5 vanity applications filed with the FCC. The most recent was submitted by Lejeck, Brian R on Jun 15, 2015. K4BRL has 9 recorded FCC license history events.
CW & Voice Analysis
Morse Code
-.- ....- -... .-. .-..
CW Weight: 31 units(Moderate)
Voice Phonetics
Kilo Four Bravo Romeo Lima
Readability: 7.5/10(High readability)
License History
- License ModifiedApr 27, 2026
- License RenewedMay 13, 2025
- License IssuedJul 3, 2015
- Vanity Callsign GrantedJul 3, 2015
- License CanceledJan 26, 2010
- Administrative Update AppliedNov 24, 2009
- Administrative Update AppliedNov 13, 2008
- License IssuedSep 4, 2004
- Vanity Callsign GrantedSep 4, 2004
Vanity Application Activity
Competing applications filed with the FCC for this callsign.