Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KM4HKY callsign genealogy
Currently held by SIMPSON, ROY E
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 KM4HKY's current licensee, walking backwards.
- Donovan, Scott RALgranted 2014-07-14cancelled 2017-07-28
Successor callsigns
Callsigns held now by people who previously held KM4HKY.
- SIMPSON, ROY ESCgranted 2024-12-31
All historical holders
Every license row we've seen with the callsign KM4HKY, oldest first.
- SIMPSON, ROY E SC2015-01-22 → cancelled 2015-03-20
- Donovan, Scott R AL2017-07-28 active