Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KI4GRJ callsign genealogy
Currently held by BACK, MARVIN R
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 KI4GRJ's current licensee, walking backwards.
- Back, David PGAgranted 2017-11-09cancelled 2018-01-09
Successor callsigns
Callsigns held now by people who previously held KI4GRJ.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KI4GRJ, oldest first.
- BACK, MARVIN R GA2004-08-16 → cancelled 2016-08-17
- Back, David P GA2018-01-09 active