Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K0TUY callsign genealogy
Currently held by OSTERHAUS, DONALD 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 K0TUY's current licensee, walking backwards.
- OSTERHAUS, DONALD Ecancelled 1999-06-02
Successor callsigns
Callsigns held now by people who previously held K0TUY.
No current licensee on record previously held this callsign.