Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KM4BO callsign genealogy
Currently held by COTTINGHAM, MICHAEL 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 KM4BO's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held KM4BO.
No current licensee on record previously held this callsign.