Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W7TWF callsign genealogy
Currently held by FIRTH III, 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 W7TWF's current licensee, walking backwards.
- FIRTH III, THOMAS WAZgranted 2014-08-20cancelled 2021-03-09
Successor callsigns
Callsigns held now by people who previously held W7TWF.
No current licensee on record previously held this callsign.