Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K1BTM callsign genealogy
Currently held by Mulhern, Richard W
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 K1BTM's current licensee, walking backwards.
- Mulhern, Richard WMEgranted 2022-03-31cancelled 2022-04-19
Successor callsigns
Callsigns held now by people who previously held K1BTM.
No current licensee on record previously held this callsign.