Confidence: Medium · Source: FCC ULS · As of 2026-09-11
AC0HT callsign genealogy
Currently held by Gritzmacher, Donald E
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 AC0HT's current licensee, walking backwards.
- Gritzmacher, Donald ECOgranted 2007-02-16cancelled 2007-04-18
Successor callsigns
Callsigns held now by people who previously held AC0HT.
- Gritzmacher, Donald ECOgranted 2025-12-09