Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W7SIM callsign genealogy
Currently held by Sim, Diane
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 W7SIM's current licensee, walking backwards.
- Sim, DianeWAgranted 2004-11-16cancelled 2005-01-07
Successor callsigns
Callsigns held now by people who previously held W7SIM.
No current licensee on record previously held this callsign.