Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KM4OGL callsign genealogy
Currently held by Thompson, David 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 KM4OGL's current licensee, walking backwards.
- Thompson, David TTNgranted 2015-12-18cancelled 2024-11-16
Successor callsigns
Callsigns held now by people who previously held KM4OGL.
- Thompson, David TTNgranted 2015-12-18cancelled 2024-11-16
All historical holders
Every license row we've seen with the callsign KM4OGL, oldest first.
- Thompson, David T TN2015-10-20 → cancelled 2015-12-18
- Thompson, David T TN2024-11-16 active