Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KC7OIO callsign genealogy
Currently held by LAKE WASHINGTON HAM CLUB
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 KC7OIO'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 KC7OIO.
- K7LWHactiveLAKE WASHINGTON HAM CLUBWAgranted 2017-05-16