Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KC9IVN callsign genealogy
Currently held by Hamers, Robert J
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 KC9IVN's current licensee, walking backwards.
- Hamers, Robert JWIgranted 2026-02-11cancelled 2026-03-03
Successor callsigns
Callsigns held now by people who previously held KC9IVN.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KC9IVN, oldest first.
- Hamers, Robert J WI2006-02-16 → cancelled 2018-02-17
- Hamers, Robert J WI2026-03-03 active