Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W9JSM callsign genealogy
Currently held by BERNHARDT, ROBERT J
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 W9JSM's current licensee, walking backwards.
- SOHN, JEFFREY MWIgranted 2007-07-14cancelled 2010-08-17
Successor callsigns
Callsigns held now by people who previously held W9JSM.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W9JSM, oldest first.
- BERNHARDT, ROBERT J IN1997-02-18 → cancelled 2009-02-19
- SOHN, JEFFREY M WI2020-06-11 active