DNS, or the Domain Name System, directs domain names toward services that handle them. Websites commonly use A or AAAA records, while email relies on MX and related records.

Common Records

• A: IPv4 address.
• AAAA: IPv6 address.
• CNAME: Another hostname.
• MX: Mail servers.
• TXT: Verification and authentication data.

Why Changes Take Time

Resolvers cache records according to their TTL. After a change, different visitors may temporarily receive different answers.

Before Changing DNS

Record existing values, confirm the new destination, review website and email records separately, and keep a rollback plan. Test HTTPS, website access, and email after the change.