Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K0TFW callsign genealogy
Currently held by SCHEFFERT, ROBERT A
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 K0TFW's current licensee, walking backwards.
- Fritsch III, Theodore WMNgranted 2022-01-12cancelled 2022-02-08
Successor callsigns
Callsigns held now by people who previously held K0TFW.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K0TFW, oldest first.
- SCHEFFERT, ROBERT A IA2004-08-27 → cancelled 2016-09-01
- Fritsch III, Theodore W MN2022-02-08 active