KP4RB
Available2x2District 4
Competitive callsign — 2 applications filed with the FCC.
License HolderRIVERA ALVERIO, RAFAEL A
License ClassAmateur Extra
Min. Class RequiredGeneral
LocationSAN JUAN, PR
Grant DateJun 29, 2010
Expiration DateSep 25, 2020
Cancellation DateSep 27, 2022
Available for ApplicationsSep 26, 2022
KP4RB is a highly sought-after 2x2 format amateur radio callsign. The license is currently held by RIVERA ALVERIO, RAFAEL A in SAN JUAN, PR. 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 Brown Sr, Ross B on Apr 3, 2025. KP4RB has 3 recorded FCC license history events.
CW & Voice Analysis
Morse Code
-.- .--. ....- .-. -...
CW Weight: 33 units(Moderate)
Voice Phonetics
Kilo Papa Four Romeo Bravo
Readability: 7.5/10(High readability)
This callsign is available now
Requires General license or higher to apply for this callsign format (2x2).
License History
- License ExpiredSep 27, 2022
- License RenewedJun 29, 2010
- License RenewedAug 16, 2000
Vanity Application Activity
Competing applications filed with the FCC for this callsign.