Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KR1MAC callsign genealogy
Currently held by MacDonald, Michael 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 KR1MAC's current licensee, walking backwards.
- MacDonald, Michael SMEgranted 2016-05-03cancelled 2016-07-06
Successor callsigns
Callsigns held now by people who previously held KR1MAC.
No current licensee on record previously held this callsign.