Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KC8CTO callsign genealogy
Currently held by Prior Jr, David H
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 KC8CTO's current licensee, walking backwards.
- Prior Jr, David HCTgranted 2025-07-18cancelled 2025-09-03
Successor callsigns
Callsigns held now by people who previously held KC8CTO.
- Guilkey, John MOHgranted 2006-07-18cancelled 2008-02-20
All historical holders
Every license row we've seen with the callsign KC8CTO, oldest first.
- GUILKEY, JOHN M OH2003-07-15 → cancelled 2006-07-18
- Prior Jr, David H CT2025-09-03 active