Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KC4OLC callsign genealogy
Currently held by CROSBY, OSCAR 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 KC4OLC's current licensee, walking backwards.
- Crosby, Oscar LGAgranted 2023-03-16cancelled 2023-04-18
Successor callsigns
Callsigns held now by people who previously held KC4OLC.
- FRITSCH, JOHN RVAgranted 2000-05-13cancelled 2012-05-15