Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K0CSU callsign genealogy
Currently held by CRANFILL, CLARK
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 K0CSU's current licensee, walking backwards.
- CRANFILL, CLARKCOgranted 2023-06-10cancelled 2023-09-23
Successor callsigns
Callsigns held now by people who previously held K0CSU.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K0CSU, oldest first.
- WRIGHT, LEONARD L CO2009-01-14 → cancelled 2021-04-14
- CRANFILL, CLARK CO2023-09-23 active