How DNS Works
https://www.DomainRegistrationDNS.com.auDomain Registration DNS operates some of the fast DNS servers in Australia. This is due to the global Anycast DNS system.
When using Anycast DNS servers changes you make to your DNS settings are updated almost instantly vs the normal 24 hour time perod. DNS look ups are fast. Really really fast. Often a single request to lookup one web page can result in over 100 different DNS lookups.This is because the site you request could have links and images that reference other websites in order to give you your results.