Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K7ROO callsign genealogy
Currently held by MUELLER, CHARLYN 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 K7ROO's current licensee, walking backwards.
- MUELLER, CHARLYN RORgranted 1994-09-09cancelled 2000-11-21
Successor callsigns
Callsigns held now by people who previously held K7ROO.
No current licensee on record previously held this callsign.