DNS (Domain Name System) is a system that translates domain names into IP addresses. Every time you enter a website address in your browser, a DNS query occurs. DNS records define how a domain is connected to its servers.
DNS Record Types
- A — maps a domain to an IPv4 address. The primary record for pointing to a server.
- AAAA — the same for IPv6 addresses.
- CNAME — canonical name (alias). Redirects one domain to another (www → example.com).
- MX — mail servers. Determines where to deliver email for the domain.
- NS — authoritative DNS servers for the domain.
- TXT — text records. Used for SPF (email spoofing protection), DKIM (email signing), and domain verification.
- SOA — Start of Authority. Contains zone information: primary DNS server, administrator email, and serial number.
When to Check DNS
DNS checks are needed when: migrating to a new host, setting up email, connecting a CDN, linking a domain to a service, or diagnosing website availability issues.
Conclusion
Check the DNS records of any domain with our DNS Lookup tool. Also check HTTP headers using the HTTP Headers tool.
