Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W1DCM callsign genealogy
Currently held by GUADLIANA, THOMAS R
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 W1DCM's current licensee, walking backwards.
- BAUER, DAVID ENCgranted 2012-12-05cancelled 2018-12-18
Successor callsigns
Callsigns held now by people who previously held W1DCM.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W1DCM, oldest first.
- GUADLIANA, THOMAS R CT2005-05-03 → cancelled 2017-07-28
- BAUER, DAVID E NC2018-12-18 active