Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4FDW callsign genealogy
Currently held by PORTER, GERALD 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 K4FDW's current licensee, walking backwards.
- DiCarlo, Frank MFLgranted 2016-11-07cancelled 2016-11-26
Successor callsigns
Callsigns held now by people who previously held K4FDW.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4FDW, oldest first.
- PORTER, GERALD C TN1988-07-05 → cancelled 2000-07-06
- DiCarlo, Frank M FL2026-09-01 active