Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KR4RF callsign genealogy
Currently held by Vest, James B
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 KR4RF's current licensee, walking backwards.
- FRANTZ, RANDY ANCgranted 2017-07-10cancelled 2017-10-28
Successor callsigns
Callsigns held now by people who previously held KR4RF.
- Vest, James BNCgranted 2016-09-17cancelled 2017-07-28
All historical holders
Every license row we've seen with the callsign KR4RF, oldest first.
- Vest, James B NC2004-02-13 → cancelled 2006-12-15
- FRANTZ, RANDY A NC2017-10-28 active