Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W8OTO callsign genealogy
Currently held by Proehl, Donald S
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 W8OTO's current licensee, walking backwards.
- Proehl, Donald SOHgranted 2003-01-22cancelled 2003-02-11
Successor callsigns
Callsigns held now by people who previously held W8OTO.
No current licensee on record previously held this callsign.