Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K9ROL callsign genealogy
Currently held by KOPACEK, ROBERT
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 K9ROL's current licensee, walking backwards.
- Krol, AllenILgranted 2011-06-24cancelled 2020-09-11
Successor callsigns
Callsigns held now by people who previously held K9ROL.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K9ROL, oldest first.
- KOPACEK, ROBERT IL1995-01-12 → cancelled 1998-07-08
- Krol, Allen IL2020-09-11 active