Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KI0QF callsign genealogy
Currently held by RYAN, 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 KI0QF's current licensee, walking backwards.
- RYAN, MARK Scancelled 1999-06-03
Successor callsigns
Callsigns held now by people who previously held KI0QF.
- RYAN, MARK SNEgranted 2000-04-25cancelled 2008-12-30