Testing new nameservers using dig

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http://serverfault.com – I have a domain, example.co.uk, and it has its nameservers registered with the registrar as current-nameserver.co.uk. It has a TXT record with value ORIGINAL. I decide to change DNS providers to new-nameserver.co.uk. As a test, I set the TXT record to have the value NEW. The idea to test the new server is lookup the TXT record and see what is returned, However, I try: dig @new-nameserver.co.uk example.co.uk TXT Despite trying numerous combinations of command, the value ORIGINAL is always returned. Why is this? And how can I preventa DNS server from providing an authoritative answer, a (HowTos)