Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4FDL callsign genealogy
Currently held by Diaz, Frank
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 K4FDL's current licensee, walking backwards.
- Diaz, FrankFLgranted 2012-04-13cancelled 2012-11-10
Successor callsigns
Callsigns held now by people who previously held K4FDL.
No current licensee on record previously held this callsign.