Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W3GMD callsign genealogy
Currently held by SIENKIEWICZ, LEON J
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 W3GMD's current licensee, walking backwards.
- KC3VRIcancelledTTOD Radio ClubDEgranted 2023-03-08cancelled 2023-03-28
Successor callsigns
Callsigns held now by people who previously held W3GMD.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W3GMD, oldest first.
- SIENKIEWICZ, LEON J PA1994-04-05 → cancelled 2006-04-06
- TTOD Radio Club DE2023-03-28 active