Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AB1RZ callsign genealogy
Currently held by Bielka, Hartmut 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 AB1RZ's current licensee, walking backwards.
- Bielka, Hartmut HCTgranted 2009-04-30cancelled 2012-10-10
Successor callsigns
Callsigns held now by people who previously held AB1RZ.
No current licensee on record previously held this callsign.