Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KC1GDR callsign genealogy
Currently held by CMMC Amateur Radio Association
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 KC1GDR's current licensee, walking backwards.
- Rotheram, Guy DCTgranted 2026-02-13cancelled 2026-03-27
Successor callsigns
Callsigns held now by people who previously held KC1GDR.
- KW1CCactiveCMMC Amateur Radio AssociationMAgranted 2016-08-30
All historical holders
Every license row we've seen with the callsign KC1GDR, oldest first.
- CMMC Amateur Radio Association MA2016-08-11 → cancelled 2016-08-30
- Rotheram, Guy D CT2026-03-27 active