Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KO4CZS callsign genealogy
Currently held by Larsen, Dayl D
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 KO4CZS's current licensee, walking backwards.
- Larsen, Dayl DFLgranted 2014-08-09cancelled 2020-04-11
Successor callsigns
Callsigns held now by people who previously held KO4CZS.
No current licensee on record previously held this callsign.