Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KC7PDX callsign genealogy
Currently held by GERBERDING, MARK W
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 KC7PDX'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 KC7PDX.
- GERBERDING, MARK WUTgranted 2025-11-29