Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K1JAR callsign genealogy
Currently held by RAHN, JONATHAN A
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 K1JAR's current licensee, walking backwards.
- RAHN, JONATHAN AGAgranted 2020-09-18cancelled 2020-10-16
Successor callsigns
Callsigns held now by people who previously held K1JAR.
- Rosser III, James ATXgranted 2014-02-15cancelled 2016-08-09
All historical holders
Every license row we've seen with the callsign K1JAR, oldest first.
- Rosser III, James A TX2013-12-14 → cancelled 2014-02-15
- RAHN, JONATHAN A GA2020-10-16 active