This article details how to test Authoritative DNS Resolution with an external tool.
- Browse to http://www.digwebinterface.com
- Enter the list of hosts you wish to test under Hostnames or IP addresses
- Select Specify myself: under Nameservers
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Enter the UltraDNS name servers you wish to test
- The ones that were assigned to you by Customer Support
- You can view these in Account settings
- Click Dig
Additional Information
The Dig answers should match whatever you have configured for the host in question in https://portal.ultradns.com.
If they do not, start the process here in contacting UltraDNS Support to assist in a speedy resolution.
Reference: Determine the root cause of authoritative DNS resolution problems