Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W1TCF callsign genealogy
Currently held by DUMOND SR, MICHAEL S
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 W1TCF's current licensee, walking backwards.
- DUMOND SR, MICHAEL SMEgranted 2003-10-23cancelled 2010-11-19
Successor callsigns
Callsigns held now by people who previously held W1TCF.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W1TCF, oldest first.
- DUMOND, FINLAND ME2005-05-14 → cancelled 2007-05-02
- DUMOND SR, MICHAEL S ME2020-11-14 active