Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W0IST callsign genealogy
Currently held by Olson, David M
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 W0IST's current licensee, walking backwards.
- Olson, David MNEgranted 2009-03-13cancelled 2011-04-09
Successor callsigns
Callsigns held now by people who previously held W0IST.
No current licensee on record previously held this callsign.