Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K7SDH callsign genealogy
Currently held by HAMILTON, SAMUEL D
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 K7SDH's current licensee, walking backwards.
- HAMILTON, SAMUEL DALgranted 2021-07-28cancelled 2024-04-30
Successor callsigns
Callsigns held now by people who previously held K7SDH.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K7SDH, oldest first.
- Harman, Stephen D WA2010-12-17 → cancelled 2023-03-11
- HAMILTON, SAMUEL D AL2024-04-30 active