Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4KOS callsign genealogy
Currently held by Snider, James C
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 K4KOS's current licensee, walking backwards.
- Snider, James CALgranted 2007-09-10cancelled 2007-11-03
Successor callsigns
Callsigns held now by people who previously held K4KOS.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4KOS, oldest first.
- COBB, DWIGHT J FL1988-01-19 → cancelled 2000-01-20
- Snider, James C AL2018-09-12 active