Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KC4MRB callsign genealogy
Currently held by SOTO, MARIO G
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 KC4MRB's current licensee, walking backwards.
- Barker, Melanie RCAgranted 2012-06-11cancelled 2012-06-29
Successor callsigns
Callsigns held now by people who previously held KC4MRB.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KC4MRB, oldest first.
- SOTO, MARIO G FL1989-10-03 → cancelled 2001-10-04
- Barker, Melanie R FL2022-04-09 active