Confidence: Medium · Source: FCC ULS · As of 2026-09-14
N0DGU callsign genealogy
Currently held by GUEMMER, DONALD G
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 N0DGU's current licensee, walking backwards.
- GUEMMER, DONALD GTXgranted 2020-05-13cancelled 2021-11-13
Successor callsigns
Callsigns held now by people who previously held N0DGU.
All historical holders
Every license row we've seen with the callsign N0DGU, oldest first.
- GUEMMER, DONALD G TX2020-05-13 → cancelled 2021-08-31
- GUEMMER, DONALD G TX2021-11-13 → cancelled 2024-10-22