Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K5MRG callsign genealogy
Currently held by CALDWELL, WILLIAM 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 K5MRG's current licensee, walking backwards.
- Gunter, Matthew RKSgranted 2020-08-21cancelled 2021-02-23
Successor callsigns
Callsigns held now by people who previously held K5MRG.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K5MRG, oldest first.
- CALDWELL, WILLIAM R NM2007-02-20 → cancelled 2019-05-21
- Gunter, Matthew R KS2021-02-23 active