Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W0YPM callsign genealogy
Currently held by TISIUS, DONALD C
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 W0YPM's current licensee, walking backwards.
- VASOLD, FRANZ LCOgranted 2016-07-19cancelled 2017-06-09
Successor callsigns
Callsigns held now by people who previously held W0YPM.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W0YPM, oldest first.
- TISIUS, DONALD C MO2001-05-16 → cancelled 2013-08-07
- VASOLD, FRANZ L CO2017-06-09 active