Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4DFC callsign genealogy
Currently held by Carter, Frank 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 K4DFC's current licensee, walking backwards.
- Carter, Frank CFLgranted 2015-02-04cancelled 2015-02-28
Successor callsigns
Callsigns held now by people who previously held K4DFC.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4DFC, oldest first.
- THOR, NELS G FL1987-12-01 → cancelled 1999-12-02
- Carter, Frank C FL2015-02-28 active