Changes to domain name information in registry-controlled DNS zones are generally not instantaneous.
Once you make changes to your domain with the registrar you purchased your domain from, the changes will first have to be uploaded to the registry, which will then update its DNS servers with the new information. ISPs DNS resolvers can then pick up this information through a sequence of stages, a simplified version of which is as follows:
Once you make changes to your domain with the registrar you purchased your domain from, the changes will first have to be uploaded to the registry, which will then update its DNS servers with the new information. ISPs DNS resolvers can then pick up this information through a sequence of stages, a simplified version of which is as follows:
- the DNS resolver queries the DNS root servers for the registry's DNS server information
- it then queries the registry's DNS servers for the domain's own DNS server information
- finally, it queries the domain's own DNS servers (which are typically run either by or on behalf of the domain's owners, often by the domain registrar that issued the domain) for the domain's detailed DNS information