Knowledge Base

DNS Records Guide: A, CNAME, MX, TXT and TTL

DNS records determine how a domain reaches websites, email and verification services.

Record types

A maps to IPv4, AAAA maps to IPv6, CNAME creates an alias, MX selects mail servers and TXT carries verification and email authentication data.

TTL

TTL controls how long resolvers cache a response. Existing answers may remain visible until their previous TTL expires.

Change checklist

• Export current records.
• Verify target values.
• Keep old services online during propagation.
• Test website and email after the change.