Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K9KOS callsign genealogy
Currently held by Geist, Janet 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 K9KOS's current licensee, walking backwards.
- Geist, Janet EALgranted 2004-08-13cancelled 2004-09-17
Successor callsigns
Callsigns held now by people who previously held K9KOS.
No current licensee on record previously held this callsign.