Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W8SSM callsign genealogy
Currently held by Donaldson, Robert W
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 W8SSM's current licensee, walking backwards.
- Donaldson, Robert WMIgranted 2018-11-27cancelled 2019-01-01
Successor callsigns
Callsigns held now by people who previously held W8SSM.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W8SSM, oldest first.
- KIMAR, JOHN E OH1997-10-23 → cancelled 2009-10-24
- Donaldson, Robert W MI2019-01-01 active