Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4SYD callsign genealogy
Currently held by Ohnmacht, Cynthia
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 K4SYD's current licensee, walking backwards.
- Ohnmacht, CynthiaALgranted 2025-11-21cancelled 2025-12-12
Successor callsigns
Callsigns held now by people who previously held K4SYD.
No current licensee on record previously held this callsign.