Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K4RPK callsign genealogy
Currently held by FOSTER, BUFORD L
The FCC publishes a previous_call_sign on
every amateur license — a self-link to the licensee's prior callsign.
Following those links produces the chain below.
Previous callsigns
Older callsigns held by K4RPK's current licensee, walking backwards.
- King Sr, Robert PNCgranted 2009-02-23cancelled 2010-05-04
Successor callsigns
Callsigns held now by people who previously held K4RPK.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4RPK, oldest first.
- FOSTER, BUFORD L GA1997-01-27 → cancelled 2009-01-28
- King Sr, Robert P NC2020-02-21 active