Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KI4UKL callsign genealogy
Currently held by BLACKWELL, JOHN R
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 KI4UKL'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 KI4UKL.
- BLACKWELL, JOHN RNCgranted 2007-03-19cancelled 2019-03-20