Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KC5OSU callsign genealogy
Currently held by HARRIS, JASON F
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 KC5OSU's current licensee, walking backwards.
- Clifton, Pat OTXgranted 2017-02-02cancelled 2017-03-07
Successor callsigns
Callsigns held now by people who previously held KC5OSU.
- HARRIS, JASON FARgranted 2000-04-11cancelled 2012-04-12
All historical holders
Every license row we've seen with the callsign KC5OSU, oldest first.
- HARRIS, JASON F AR1995-05-22 → cancelled 2000-04-11
- Clifton, Pat O TX2017-03-07 active