Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W0OLE callsign genealogy
Currently held by KAHLSTORF Dr, TRAVIS D
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 W0OLE's current licensee, walking backwards.
- KAHLSTORF, TRAVIS DMNgranted 2016-03-08cancelled 2018-11-17
Successor callsigns
Callsigns held now by people who previously held W0OLE.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W0OLE, oldest first.
- JOHNSON, ROBERT W MN2013-05-01 → cancelled 2017-07-24
- KAHLSTORF Dr, TRAVIS D MN2018-11-17 active