DNS Lookup Guide: Understanding A, AAAA, MX, TXT, and CNAME Records
Explore the internet's phonebook: discover how the Domain Name System resolves human-friendly domains to IP addresses and how to inspect critical records.
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What is DNS (Domain Name System)?
DNS translates human-readable domain names (such as example.com) into machine-routable numerical IP addresses (such as 93.184.216.34).
Essential DNS Record Types
- A Record: Maps a hostname to an IPv4 address.
- AAAA Record: Maps a hostname to an IPv6 address.
- CNAME (Canonical Name): Aliases one domain or subdomain to another.
- MX (Mail Exchange): Specifies mail servers responsible for accepting incoming email, ranked by priority.
- TXT Record: Holds arbitrary text, used for SPF, DKIM, DMARC, and domain ownership validation.
- NS (Name Server): Delegates a DNS zone to authoritative servers.
- SOA (Start of Authority): Contains administrative and zone transfer parameters.
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β Frequently Asked Questions (FAQ)
What does DNS TTL mean? βΎ
TTL (Time to Live) defines the duration (in seconds) that resolvers and caches are allowed to store the DNS record before re-querying.