What is a DNS record?
A practical introduction to DNS records, what they do, and how different record types are used.
Introduction
A DNS record is an entry published in the Domain Name System that tells other systems something about a domain or hostname.
Different record types serve different purposes. Some map names to IP addresses, some define email routing, and some publish security and verification information.
Why DNS records matter
Without DNS records, domains would not know how to resolve websites, receive email, or publish security and verification information.
DNS is one of the most important control layers for websites, email, and many cloud services.
Common DNS record types
- A and AAAA records for IP addressing
- CNAME records for aliases
- MX records for email routing
- TXT records for policies and verification
- NS records for nameserver delegation