Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K9RCM callsign genealogy
Currently held by McMahon, Bob 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 K9RCM's current licensee, walking backwards.
- McMahon, Bob CWIgranted 2008-03-11cancelled 2008-05-06
Successor callsigns
Callsigns held now by people who previously held K9RCM.
No current licensee on record previously held this callsign.