What is a DNS lookup?

A DNS lookup queries the Domain Name System to resolve a domain name to its associated records — IP addresses (A/AAAA), mail servers (MX), name servers (NS), text records (TXT), etc.

What is the difference between A and AAAA records?

A records map a domain to an IPv4 address (e.g. 93.184.216.34). AAAA records map to an IPv6 address (e.g. 2606:2800:220:1:248:1893:25c8:1946). Most sites have both.

What are MX records used for?

MX (Mail Exchange) records specify which mail servers handle email for a domain. The priority number determines the order servers are tried — lower number = higher priority.

What are TXT records used for?

TXT records store arbitrary text. They are commonly used for domain verification (Google, Microsoft), SPF email authentication, DKIM signatures, and DMARC policies.

TTL (Time To Live) is the number of seconds a DNS record can be cached before resolvers must re-query for fresh data. Shorter TTL means faster propagation of changes; longer TTL reduces DNS query load.

Why do DNS changes take time to propagate?

DNS changes propagate as cached records expire based on their TTL values. With a 3600s (1 hour) TTL, resolvers worldwide can serve the old record for up to 1 hour after a change.

DNS Lookup — Check DNS Records for Any Domain Free Online

Look up A, AAAA, CNAME, MX, NS, TXT, and SOA records for any domain. Uses Google Public DNS for accurate results. Free, instant.

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DNS queries are made via Google Public DNS server-side. Your queries are not exposed to third parties.

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What is DNS Lookup — Check DNS Records Free Online?

A DNS lookup queries the Domain Name System to retrieve all DNS records associated with a domain. This includes A records (IPv4 addresses), AAAA records (IPv6), CNAME records (aliases), MX records (mail servers), NS records (nameservers), TXT records (verification and email authentication), and SOA records (zone authority). DNS records are the fundamental configuration layer that tells the internet how to route traffic to your domain.

How to Use DNS Lookup — Check DNS Records Free Online

1Enter the domain name you want to query.
2Select the DNS record type from the dropdown, or choose 'All' for a full lookup.
3Click Lookup to query using Google Public DNS.
4Review each record type with its value and TTL.
5Use the results to verify DNS configuration or diagnose issues.

Key Features

Supports A, AAAA, CNAME, MX, NS, TXT, SOA record types
Uses Google Public DNS (8.8.8.8) for authoritative results
TTL displayed for each record
All record types in one query option
Instant results

Benefits

Verify DNS records are correctly set after domain configuration
Diagnose email delivery issues by checking MX and TXT records
Confirm DNS changes have propagated from your perspective
Audit all DNS records for a domain in one place

Use Cases

WHOIS lookup guide

Why Use Irreva for DNS Lookup — Check DNS Records Free Online?

Verify DNS records are correctly set after domain configuration

Diagnose email delivery issues by checking MX and TXT records

Confirm DNS changes have propagated from your perspective

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