Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KN4FKP callsign genealogy
Currently held by Johnson Jr, Ralph S
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 KN4FKP's current licensee, walking backwards.
The current licensee has not held any other callsign on record.
Successor callsigns
Callsigns held now by people who previously held KN4FKP.
- Johnson Jr, Ralph SSCgranted 2021-06-29