Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KI4SDX callsign genealogy
Currently held by Arroyo, Jose M
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 KI4SDX'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 KI4SDX.
- Arroyo, Jose MFLgranted 2006-11-16cancelled 2007-05-04