Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KM0OS callsign genealogy
Currently held by Jantz, Clifford 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 KM0OS's current licensee, walking backwards.
- Jantz, Clifford EIAgranted 2017-09-22cancelled 2018-04-17
Successor callsigns
Callsigns held now by people who previously held KM0OS.
No current licensee on record previously held this callsign.