Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WD9MMM callsign genealogy
Currently held by SPARKS, MICHAEL R
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 WD9MMM's current licensee, walking backwards.
- SPARKS, MICHAEL RINgranted 2019-04-23cancelled 2019-05-18
Successor callsigns
Callsigns held now by people who previously held WD9MMM.
No current licensee on record previously held this callsign.