Confidence: Medium · Source: FCC ULS · As of 2026-09-14
WB4SMH callsign genealogy
Currently held by Clark, Robert M
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 WB4SMH's current licensee, walking backwards.
- Clark, Robert MNCgranted 2024-06-22cancelled 2024-07-26
Successor callsigns
Callsigns held now by people who previously held WB4SMH.
No current licensee on record previously held this callsign.