Confidence: Medium · Source: FCC ULS · As of 2026-09-11
KS4RAM callsign genealogy
Currently held by Mattheis, Sean
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 KS4RAM's current licensee, walking backwards.
- Mattheis, SeanGAgranted 2026-07-01cancelled 2026-07-24
Successor callsigns
Callsigns held now by people who previously held KS4RAM.
No current licensee on record previously held this callsign.