Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W4TWF callsign genealogy
Currently held by FRIELDS, THOMAS W
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 W4TWF's current licensee, walking backwards.
- FRIELDS, THOMAS WFLgranted 1996-02-07cancelled 2005-02-05
Successor callsigns
Callsigns held now by people who previously held W4TWF.
No current licensee on record previously held this callsign.