Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KA4MDR callsign genealogy
Currently held by Rich, Joseph S
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 KA4MDR's current licensee, walking backwards.
- Rich, Joseph SNCgranted 2015-06-30cancelled 2020-03-03
Successor callsigns
Callsigns held now by people who previously held KA4MDR.
- RICH, JOSEPH SNCgranted 2020-04-07