Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W9MCL callsign genealogy
Currently held by Leonberger, Mark C
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 W9MCL's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held W9MCL.
No current licensee on record previously held this callsign.