Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K9MDT callsign genealogy
Currently held by BAUM, JOSEPH E
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 K9MDT's current licensee, walking backwards.
- BAUM, JOSEPH Ecancelled 1999-03-31
Successor callsigns
Callsigns held now by people who previously held K9MDT.
- BAUM, JOSEPH EILgranted 2025-04-26