Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KM4UZB callsign genealogy
Currently held by BARRED OWL RADIO CLUB
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 KM4UZB'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 KM4UZB.
- W4OWLactiveBARRED OWL RADIO CLUBVAgranted 2016-07-19