Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KF6WTF callsign genealogy
Currently held by SCHAFFER, NATHANAEL E
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 KF6WTF's current licensee, walking backwards.
- Mintz, MarkCAgranted 2014-10-17cancelled 2022-05-03
Successor callsigns
Callsigns held now by people who previously held KF6WTF.
- SCHAFFER, NATHANAEL ECAgranted 2020-01-28
All historical holders
Every license row we've seen with the callsign KF6WTF, oldest first.
- SCHAFFER, NATHANAEL E CA2019-06-14 → cancelled 2020-01-28
- Mintz, Mark CA2022-05-03 active