There are several different DMR networks. This is not an exhaustive list:
Brandmeister: https://brandmeister.network/
DMR-MARC: https://dmr-marc.net/repeaters.html
The folks over at AlabamaDMR are maintaining the most up-to-date (to our knowledge) list of Amateur DMR Repeaters in Alabama.
Copyright 2023, Alabama Repeater Council, PO Box 21174, Tuscaloosa, AL 35402-1174