Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KS4OL callsign genealogy
Currently held by PLESS III, JOHN 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 KS4OL'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 KS4OL.
- PLESS III, JOHN LGAgranted 2017-05-16