Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N0SLK callsign genealogy
Currently held by GAVAGAN, JOHN 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 N0SLK's current licensee, walking backwards.
- Kjonaas, SteveCOgranted 2014-09-26cancelled 2016-01-22
Successor callsigns
Callsigns held now by people who previously held N0SLK.
- Kjonaas, SteveCOgranted 2022-05-27
All historical holders
Every license row we've seen with the callsign N0SLK, oldest first.
- GAVAGAN, JOHN C IA2002-12-26 → cancelled 2015-03-24
- Kjonaas, Steve CO2016-01-22 → cancelled 2022-05-27