Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K5RGK callsign genealogy
Currently held by KOELLING, RONALD 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 K5RGK's current licensee, walking backwards.
- KOELLING, RONALD GOKgranted 2017-02-07cancelled 2021-05-15
Successor callsigns
Callsigns held now by people who previously held K5RGK.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K5RGK, oldest first.
- KREWSON, RONALD G OK2000-08-15 → cancelled 2012-08-16
- KOELLING, RONALD G OK2021-05-15 active