Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KG4OUC callsign genealogy
Currently held by McKinney, Mark T
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 KG4OUC's current licensee, walking backwards.
- McKinney, Mark TNCgranted 2019-02-26cancelled 2019-11-13
Successor callsigns
Callsigns held now by people who previously held KG4OUC.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KG4OUC, oldest first.
- McKinney, Mark T NC2001-08-10 → cancelled 2013-08-13
- McKinney, Mark T NC2019-11-13 active