Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AD9K callsign genealogy
Currently held by SCHOENBACH, HERBERT 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 AD9K's current licensee, walking backwards.
- DARDEN, RICHARD CWIgranted 1997-02-04cancelled 2000-12-19
Successor callsigns
Callsigns held now by people who previously held AD9K.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign AD9K, oldest first.
- SCHOENBACH, HERBERT R IL1987-12-15 → cancelled 1999-12-16
- DARDEN, RICHARD C WI2020-10-17 active