Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WD9H callsign genealogy
Currently held by CERNEK, CARL C
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 WD9H's current licensee, walking backwards.
- CERNEK, CARL CILgranted 2003-08-29cancelled 2011-05-03
Successor callsigns
Callsigns held now by people who previously held WD9H.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign WD9H, oldest first.
- SMITH, HAROLD E GA1998-08-26 → cancelled 2010-08-27
- CERNEK, CARL C IL2021-02-06 active