Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AD4CL callsign genealogy
Currently held by ZICKUHR, DARREL L
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 AD4CL's current licensee, walking backwards.
- Brukardt, RyanFLgranted 2025-02-20cancelled 2025-09-20
Successor callsigns
Callsigns held now by people who previously held AD4CL.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign AD4CL, oldest first.
- ZICKUHR, DARREL L FL1995-05-25 → cancelled 2005-04-07
- Brukardt, Ryan FL2025-09-20 active