Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K9BJK callsign genealogy
Currently held by Krotzman, Brian J
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 K9BJK's current licensee, walking backwards.
- Krotzman, Brian JWIgranted 2005-09-30cancelled 2007-03-13
Successor callsigns
Callsigns held now by people who previously held K9BJK.
- Krotzman, Brian JWIgranted 2013-05-31cancelled 2017-03-03