Changing nameservers changes which DNS servers are authoritative for the domain. The new authoritative zone must already contain the records required for the website, mail, and other services.
- Confirm the registrar shows the intended nameservers.
- Verify the new nameservers answer authoritatively for the domain.
- Compare the new zone’s A/AAAA, MX, TXT, CNAME, and other required records with the old zone before migration.
- Check mail-related DNS such as MX, SPF, DKIM, and DMARC after the switch.
- Allow cached delegation/records to expire before concluding that different recursive resolvers indicate a new configuration error.
Do not delete the old DNS zone immediately if it is still serving cached or delegated traffic during a controlled migration.
