Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KF7WUM callsign genealogy
Currently held by Klein, John R
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 KF7WUM'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 KF7WUM.
- Klein, John RAKgranted 2012-07-19cancelled 2016-06-14