Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K0AUN callsign genealogy
Currently held by JACOBS, ALEXANDER J
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 K0AUN's current licensee, walking backwards.
- Sitchler, Jason CCOgranted 2026-04-15cancelled 2026-05-05
Successor callsigns
Callsigns held now by people who previously held K0AUN.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K0AUN, oldest first.
- JACOBS, ALEXANDER J MO2007-11-09 → cancelled 2020-02-04
- Sitchler, Jason C CO2026-05-05 active