Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KO4AHT callsign genealogy
Currently held by Lark, Calvin R
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 KO4AHT's current licensee, walking backwards.
- Lark, Calvin RFLgranted 2019-07-19cancelled 2019-11-26
Successor callsigns
Callsigns held now by people who previously held KO4AHT.
- Lark, Calvin RFLgranted 2020-02-15