Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K7DU callsign genealogy
Currently held by Cummings, Gregory 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 K7DU's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held K7DU.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K7DU, oldest first.
- Cummings, George A WY2005-02-28 → cancelled 2007-05-22
- Cummings, Gregory S WA2017-10-03 active