Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KN4CK callsign genealogy
Currently held by COWAN, DONALD G
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 KN4CK's current licensee, walking backwards.
- Stoike, Gregory JMIgranted 2010-04-15cancelled 2015-01-09
Successor callsigns
Callsigns held now by people who previously held KN4CK.
- Stoike, Gregory JMIgranted 2021-12-07
All historical holders
Every license row we've seen with the callsign KN4CK, oldest first.
- COWAN, DONALD G TN1998-11-25 → cancelled 2010-11-27
- Stoike, Gregory J MI2015-01-09 → cancelled 2021-12-07