Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4MJR callsign genealogy
Currently held by Robinson, Mandy J
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 K4MJR's current licensee, walking backwards.
- Robertson, Mitchell JALgranted 2019-12-09cancelled 2019-12-31
Successor callsigns
Callsigns held now by people who previously held K4MJR.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4MJR, oldest first.
- Robinson, Mandy J GA2004-12-24 → cancelled 2016-12-28
- Robertson, Mitchell J AL2019-12-31 active