Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4ROO callsign genealogy
Currently held by BEAUDOIN, MATTHEW B
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 K4ROO's current licensee, walking backwards.
- BEAUDOIN, MATTHEW BTNgranted 2015-12-01cancelled 2015-12-22
Successor callsigns
Callsigns held now by people who previously held K4ROO.
No current licensee on record previously held this callsign.