Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KR4DHJ callsign genealogy
Currently held by FARRELL, WILLIAM P
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 KR4DHJ's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held KR4DHJ.
No current licensee on record previously held this callsign.