Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WB9STU callsign genealogy
Currently held by Mahnke, Kenneth R
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 WB9STU's current licensee, walking backwards.
- Mahnke, Kenneth RTXgranted 2001-10-23cancelled 2004-07-20
Successor callsigns
Callsigns held now by people who previously held WB9STU.
- Mahnke, Kenneth RTXgranted 2008-08-26cancelled 2015-07-17