Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K0JRR callsign genealogy
Currently held by HERTEEN, JAMES W
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 K0JRR's current licensee, walking backwards.
- Ridges, J RandUTgranted 2020-03-16cancelled 2020-04-17
Successor callsigns
Callsigns held now by people who previously held K0JRR.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K0JRR, oldest first.
- HERTEEN, JAMES W IA2009-04-07 → cancelled 2020-02-27
- Ridges, J. Rand UT2020-04-17 active