Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W9MMB callsign genealogy
Currently held by Baier, Michael P
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 W9MMB's current licensee, walking backwards.
- Baier, Michael PILgranted 2015-11-25cancelled 2018-06-05
Successor callsigns
Callsigns held now by people who previously held W9MMB.
No current licensee on record previously held this callsign.