Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K1DWU callsign genealogy
Currently held by WOODSTOCK, JOHN T
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 K1DWU's current licensee, walking backwards.
- WOODSTOCK, JOHN Tcancelled 1998-01-23
Successor callsigns
Callsigns held now by people who previously held K1DWU.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K1DWU, oldest first.
- WOODSTOCK, FRANK E MA1992-09-22 → cancelled 1997-09-25
- WOODSTOCK, JOHN T CO2017-10-26 active