Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KL4RKH callsign genealogy
Currently held by Clark, Hyrum J
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 KL4RKH's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held KL4RKH.
No current licensee on record previously held this callsign.