Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KZ1DRS callsign genealogy
Currently held by RIVENBARK, CHARLES F
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 KZ1DRS's current licensee, walking backwards.
- RIVENBARK, CHARLES FFLgranted 2012-10-10cancelled 2014-02-08
Successor callsigns
Callsigns held now by people who previously held KZ1DRS.
No current licensee on record previously held this callsign.