Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KF7ZJF callsign genealogy
Currently held by Schaefer, Duane J
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 KF7ZJF's current licensee, walking backwards.
- Schaefer, Duane JORgranted 2012-10-25cancelled 2012-11-09
Successor callsigns
Callsigns held now by people who previously held KF7ZJF.
- Schaefer, Duane JORgranted 2012-10-25cancelled 2024-11-28