Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WA9ERC callsign genealogy
Currently held by KOMPERDA, MARC A
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 WA9ERC's current licensee, walking backwards.
- KOMPERDA, MARC AFLgranted 2007-02-09cancelled 2015-05-08
Successor callsigns
Callsigns held now by people who previously held WA9ERC.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign WA9ERC, oldest first.
- KNOPP, WILLIAM S FL1997-09-24 → cancelled 2009-01-10
- KOMPERDA, MARC A GA2015-05-08 active