Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W0TDH callsign genealogy
Currently held by MARTS, GEORGE F
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 W0TDH's current licensee, walking backwards.
- FISCHEL JR, THOMAS FNCgranted 1999-03-05cancelled 2006-01-07
Successor callsigns
Callsigns held now by people who previously held W0TDH.
- MARTS, GEORGE FMOgranted 2010-01-27cancelled 2022-04-01
All historical holders
Every license row we've seen with the callsign W0TDH, oldest first.
- MARTS, GEORGE F MO1995-08-24 → cancelled 2000-03-31
- FISCHEL JR, THOMAS F NC2025-11-27 active