Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W9ISU callsign genealogy
Currently held by INDIANA STATE UNIVERSITY AMATEUR RADIO 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 W9ISU's current licensee, walking backwards.
- KC9AAZcancelledINDIANA STATE UNIVERSITY AMATEUR RADIO CLUBINgranted 2001-07-30cancelled 2001-08-21
Successor callsigns
Callsigns held now by people who previously held W9ISU.
No current licensee on record previously held this callsign.