Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WS4R callsign genealogy
Currently held by Sanders, Joseph 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 WS4R's current licensee, walking backwards.
- Modesitt, Brooks FNCgranted 2021-07-06cancelled 2021-08-03
Successor callsigns
Callsigns held now by people who previously held WS4R.
- HOFFMAN, MARK RFLgranted 2026-08-08
All historical holders
Every license row we've seen with the callsign WS4R, oldest first.
- SERING, ROBERT L NC1998-12-09 → cancelled 2005-04-24
- Sanders, Joseph J FL2009-07-14 → cancelled 2020-09-05
- Modesitt, Brooks F NC2021-08-03 active