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

https://www.fiberserver.net.tr/en/knowledgebase/article/dns-records-a-cname-mx-txt-ttl-guide

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.