Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KI4TDT callsign genealogy
Currently held by Schumaker, Duane J
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 KI4TDT'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 KI4TDT.
- Schumaker, Duane JTNgranted 2016-11-01