Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W8ADC callsign genealogy
Currently held by KOCZAN, CASIMIR 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 W8ADC's current licensee, walking backwards.
- KOSDROSKY, RICHARD ATXgranted 2016-06-27cancelled 2016-09-10
Successor callsigns
Callsigns held now by people who previously held W8ADC.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W8ADC, oldest first.
- KOCZAN, CASIMIR J OH1988-09-27 → cancelled 2000-09-28
- KOSDROSKY, RICHARD A IN2026-08-01 active