Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KM7DX callsign genealogy
Currently held by SHERBERT, 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 KM7DX's current licensee, walking backwards.
- SHERBERT, MARK TUTgranted 1995-07-24cancelled 2003-05-13
Successor callsigns
Callsigns held now by people who previously held KM7DX.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KM7DX, oldest first.
- SHERBERT, MARK T UT2023-02-22 active
- —— → cancelled 1999-01-28