Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4UDT callsign genealogy
Currently held by Mansfield, Aubrey 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 K4UDT's current licensee, walking backwards.
- Franck, MichaelGAgranted 2020-08-14cancelled 2021-10-19
Successor callsigns
Callsigns held now by people who previously held K4UDT.
- Mansfield, Aubrey LVAgranted 2007-11-14cancelled 2013-06-28
All historical holders
Every license row we've seen with the callsign K4UDT, oldest first.
- Mansfield, Aubrey L VA2006-01-06 → cancelled 2007-11-14
- Franck, Michael GA2021-10-19 active