Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K0ES callsign genealogy
Currently held by Sorensen, Keith E
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 K0ES's current licensee, walking backwards.
- Kirshenbaum, GeraldCOgranted 2018-01-09cancelled 2019-07-26
Successor callsigns
Callsigns held now by people who previously held K0ES.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K0ES, oldest first.
- Sorensen, Keith E MN2007-04-25 → cancelled 2017-07-05
- Kirshenbaum, Gerald CO2019-07-26 active