Nameservers identify the provider responsible for the domain's DNS zone. DNS records inside that zone direct website, email, verification, and other services.
Before changing DNS
- Record the current nameservers and all important DNS records.
- Identify where website and email services are hosted.
- Lower the relevant TTL in advance when planning a controlled migration.
- Confirm the destination values from the service welcome details.
After a change, recursive resolvers may continue using cached data until the previous TTL expires. Different networks can temporarily receive different answers. This is normal propagation behavior and does not always indicate a failed change.
Check the authoritative nameservers first, then A, AAAA, CNAME, MX, TXT, and CAA records that affect the service. Avoid repeatedly changing records while caches are updating because that makes diagnosis harder.
