Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KO4MDS callsign genealogy
Currently held by SMITH, MIKE D
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 KO4MDS's current licensee, walking backwards.
- SMITH, MIKE DFLgranted 2016-03-04cancelled 2016-04-23
Successor callsigns
Callsigns held now by people who previously held KO4MDS.
- SMITH, MIKE DFLgranted 2016-11-11