Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W4BDF callsign genealogy
Currently held by ZUFELT, MICHAEL L
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 W4BDF's current licensee, walking backwards.
- Floyd, Bryan DTNgranted 2017-05-08cancelled 2017-06-24
Successor callsigns
Callsigns held now by people who previously held W4BDF.
- ZUFELT, MICHAEL LFLgranted 2007-08-03cancelled 2013-11-06
All historical holders
Every license row we've seen with the callsign W4BDF, oldest first.
- ZUFELT, MICHAEL L FL2000-03-18 → cancelled 2007-08-03
- Floyd, Bryan D TN2017-06-24 active