Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K9EMS callsign genealogy
Currently held by Siebeneich, Christopher 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 K9EMS's current licensee, walking backwards.
- Siebeneich, Christopher AWIgranted 2008-03-06cancelled 2012-12-01
Successor callsigns
Callsigns held now by people who previously held K9EMS.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K9EMS, oldest first.
- BORDERS, JAMIE R IN2000-01-14 → cancelled 2012-01-18
- Siebeneich, Christopher A WI2023-04-11 active