Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KD8UP callsign genealogy
Currently held by MACE, SAMUEL 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 KD8UP's current licensee, walking backwards.
- MACE, SAMUEL CWIgranted 2016-10-31cancelled 2020-09-26
Successor callsigns
Callsigns held now by people who previously held KD8UP.
- BOTNER, JAMES MOHgranted 2001-09-20cancelled 2013-11-13
All historical holders
Every license row we've seen with the callsign KD8UP, oldest first.
- BOTNER, JAMES M OH1991-11-12 → cancelled 2001-08-15
- MACE, SAMUEL C WI2020-09-26 active