Confidence: Medium · Source: FCC ULS · As of 2026-09-14
N9XK callsign genealogy
Currently held by Seidler, Mark S
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 N9XK's current licensee, walking backwards.
- Seidler, Mark SFLgranted 1999-06-30cancelled 2001-03-27
Successor callsigns
Callsigns held now by people who previously held N9XK.
No current licensee on record previously held this callsign.