Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KJ4RUO callsign genealogy
Currently held by Cattail Branch Wireless Society
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 KJ4RUO'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 KJ4RUO.
- W4KKNactiveCattail Branch Wireless SocietyVAgranted 2020-09-02