Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KI4OXU callsign genealogy
Currently held by Graff, Tyler A
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 KI4OXU's current licensee, walking backwards.
The current licensee has not held any other callsign on record.
Successor callsigns
Callsigns held now by people who previously held KI4OXU.
- Graff, TylerCOgranted 2006-05-01cancelled 2009-12-04