Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K4CGA callsign genealogy
Currently held by USCG AUXILIARY TAMPA BAY
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 K4CGA's current licensee, walking backwards.
- DUVALL, CHARLES JGAgranted 2015-01-03cancelled 2015-02-20
Successor callsigns
Callsigns held now by people who previously held K4CGA.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4CGA, oldest first.
- USCG AUXILIARY TAMPA BAY FL1999-09-30 → cancelled 2011-10-01
- DUVALL, CHARLES J GA2024-12-12 active