Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K7ONJ callsign genealogy
Currently held by Mulder, Stephen W
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 K7ONJ's current licensee, walking backwards.
- Mulder, Stephen WORgranted 2020-06-15cancelled 2025-09-13
Successor callsigns
Callsigns held now by people who previously held K7ONJ.
No current licensee on record previously held this callsign.