Confidence: Medium · Source: FCC ULS · As of 2026-09-14
WX4UMW callsign genealogy
Currently held by Muckinhaupt, Michael C
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 WX4UMW's current licensee, walking backwards.
- Muckinhaupt, Michael CFLgranted 2021-09-14
Successor callsigns
Callsigns held now by people who previously held WX4UMW.
- Muckinhaupt, Michael CFLgranted 2021-09-14