Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KD0MDM callsign genealogy
Currently held by GRISWOLD, THOMAS L
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 KD0MDM's current licensee, walking backwards.
The current licensee has not held any other callsign on record.
Successor callsigns
Callsigns held now by people who previously held KD0MDM.
- GRISWOLD, THOMAS LKSgranted 2010-10-23cancelled 2011-02-23