Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AB3ZC callsign genealogy
Currently held by SIEBACH, RONALD K
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 AB3ZC's current licensee, walking backwards.
- SIEBACH, RONALD KDEgranted 2007-08-20cancelled 2016-04-29
Successor callsigns
Callsigns held now by people who previously held AB3ZC.
No current licensee on record previously held this callsign.