Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KB4ICU callsign genealogy
Currently held by Warner 554, David 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 KB4ICU's current licensee, walking backwards.
- Warner, David MFLgranted 2019-10-15cancelled 2019-12-10
Successor callsigns
Callsigns held now by people who previously held KB4ICU.
No current licensee on record previously held this callsign.