Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KF4OSZ callsign genealogy
Currently held by HERSCHLER, DANIEL A
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 KF4OSZ's current licensee, walking backwards.
The current licensee has not held any other callsign on record.
Successor callsigns
Callsigns held now by people who previously held KF4OSZ.
- Herschler, Daniel AVAgranted 2006-11-14cancelled 2006-12-05