Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W4COS callsign genealogy
Currently held by Stogner III, Charles O
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 W4COS's current licensee, walking backwards.
- Stogner III, Charles OSCgranted 2013-03-19cancelled 2014-07-18
Successor callsigns
Callsigns held now by people who previously held W4COS.
No current licensee on record previously held this callsign.