Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W8WU callsign genealogy
Currently held by UNTERKIRCHER, WARREN I
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 W8WU's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held W8WU.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W8WU, oldest first.
- UNTERKIRCHER, WARREN I MI2007-02-23 → cancelled 2015-12-27
- Applin, John M MI2018-01-17 active