Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KF7ZYX callsign genealogy
Currently held by Geisel, Jens
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 KF7ZYX's current licensee, walking backwards.
The current licensee has not held any other callsign on record.
Successor callsigns
Callsigns held now by people who previously held KF7ZYX.
- Geisel, JensNYgranted 2012-11-30cancelled 2014-03-06