Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KR4RQ callsign genealogy
Currently held by BAUMBACH, ALAN H
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 KR4RQ's current licensee, walking backwards.
- KI4FYno FCC ULS record on file
Successor callsigns
Callsigns held now by people who previously held KR4RQ.
- BAUMBACH, ALAN HFLgranted 2014-03-25cancelled 2026-05-19