Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KM4OSA callsign genealogy
Currently held by Hardin Jr., Cecil E
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 KM4OSA'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 KM4OSA.
- Hardin JR, Cecil EKYgranted 2016-12-30