Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KT0JA callsign genealogy
Currently held by ARNOLD, JASON P
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 KT0JA's current licensee, walking backwards.
- ARNOLD, JASON PCOgranted 2019-03-26cancelled 2021-10-22
Successor callsigns
Callsigns held now by people who previously held KT0JA.
- ARNOLD, JASON PCOgranted 2019-03-26cancelled 2021-10-22
All historical holders
Every license row we've seen with the callsign KT0JA, oldest first.
- ARNOLD, JASON P CO2011-07-23 → cancelled 2019-03-26
- ARNOLD, JASON P CO2021-10-22 active