Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KB1IBU callsign genealogy
Currently held by BUTLER, MICHAEL W
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 KB1IBU'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 KB1IBU.
- Butler, Michael WMEgranted 2002-04-02cancelled 2002-06-19