Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K7RSM callsign genealogy
Currently held by MC DONALD, ROBERT S
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 K7RSM's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held K7RSM.
No current licensee on record previously held this callsign.