Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K0UIS callsign genealogy
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 K0UIS's current licensee, walking backwards.
- AHRENS, AMY MCOgranted 2014-05-17cancelled 2024-02-09
Successor callsigns
Callsigns held now by people who previously held K0UIS.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K0UIS, oldest first.
- AHRENS, AMY M CO2024-02-09 active
- —— → cancelled 1998-09-10