The following command and switches can be used to view all of your trusts. You can perform them from any system in your domain, just specify the DC in the command.
nltest /server:dc_name /domain_trusts /all_trusts
Just replace the dc_name with your domain controllers name and it will list all of your trusts to the domain that the DC resides in.
Another tidbit I like to do is filter it by name if you have multiple namespaces.
nltest /server:dc_name /domain_trusts /all_trusts | find /i “name”
Here you would replace name with the name of a domain or part of the namespace you are looking for.