Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KD0NWM callsign genealogy
Currently held by Janssen, Steve L
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 KD0NWM's current licensee, walking backwards.
- Janssen, Steve LCOgranted 2011-03-14cancelled 2011-06-14
Successor callsigns
Callsigns held now by people who previously held KD0NWM.
- Janssen, Steve LCOgranted 2011-03-14cancelled 2011-06-14
All historical holders
Every license row we've seen with the callsign KD0NWM, oldest first.
- Janssen, Steve L CO2011-03-14 → cancelled 2011-04-15
- Janssen, Steve L CO2021-03-23 active