Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W3FDH callsign genealogy
Currently held by Hartley, Frank D
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 W3FDH's current licensee, walking backwards.
- Hartley, Frank DOHgranted 2020-02-10cancelled 2020-03-13
Successor callsigns
Callsigns held now by people who previously held W3FDH.
No current licensee on record previously held this callsign.