Check if a Hostname is an Empty Non-Terminal

1. Login to https://portal.ultradns.com
2. Click Domains
3. Search for *.domain.com
4. Verify that there is a record of any type for *.domain.com
5. Search for example.domain.com
   1. If any records contain 'example.domain.com' and are not exactly example.domain.com, then example.domain.com is an empty non-terminal and requires a specific (not wildcard) record in order to resolve
   2. If no records contain 'example.domain.com' then it is not an empty non-terminal

Additional Information

For more information on empty non-terminals, please see this RFC.

Insight into  Step 5-1
For example, if there is a record that has qa.example.domain.com that contains example.domain.com in the hostname, qa.example.domain.com contains example.domain.com.