DNS Lookup Tool: Check Any Domain’s DNS Records Free

A DNS lookup tool shows how a domain is configured in the Domain Name System, the global directory that turns names like example.com into IP addresses, mail servers and verification records. This free DNS lookup tool queries public resolvers over HTTPS and returns clean, grouped results you can copy, export or share. Use it when you launch a site, move hosting, connect email or chase down a connectivity problem.

How to Use This DNS Checker

1. Type a domain such as example.com. A full URL also works, because the tool strips the protocol and path for you.
2. Pick a record type, or keep All records to query eight types at once.
3. Choose a resolver, or tick Compare both resolvers to spot caching differences.
4. Press Lookup, then copy a single value, export JSON or CSV, or share a direct link to the result.
5. Press Reset to clear the form and start fresh.

New Features in This Advanced Version

• All-records mode that really queries every type in parallel.
• Reverse DNS (PTR) lookups for IPv4 addresses.
• Email health check for MX, SPF and DMARC with plain-language verdicts.
• Google and Cloudflare resolvers, with a side-by-side comparison option.
• One-click copy, JSON and CSV export, shareable links and saved history.

Understanding DNS Record Types

A and AAAA records

An A record points a name to an IPv4 address, and an AAAA record points it to an IPv6 address. They decide which server answers when someone opens your site.

MX records

MX records name the mail servers for a domain. Each carries a priority number, and lower numbers are tried first. Missing or wrong MX records are the most common reason email bounces.

NS and SOA records

NS records list the authoritative nameservers. The SOA record describes the zone: its primary server, admin contact, serial number and refresh timers.

TXT records

TXT records hold free text. They carry SPF policies, DKIM keys, DMARC rules and ownership tokens for services like Google Search Console.

CNAME and CAA records

A CNAME makes one name an alias of another. A CAA record limits which certificate authorities may issue SSL certificates for your domain.

Why a CNAME cannot sit at the root

The DNS standard forbids a CNAME beside other records, and the root of a domain always has NS and SOA records. Use an A record or your provider’s ALIAS feature there instead.

Reverse DNS Lookup

A reverse lookup maps an IP address back to a hostname using a PTR record. Mail servers rely on it: many receivers reject messages from IPs with no matching reverse record. Enter an IPv4 address and the tool converts it to the in-addr.arpa form and queries it automatically.

Email Health Check: SPF, DMARC and MX

Email authentication protects your domain from spoofing and keeps legitimate mail out of spam folders. Choose Email health to see whether the domain has mail servers, an SPF record and a DMARC policy. A DMARC policy of p=none only monitors, while quarantine or reject actively protects your domain. For a deeper background, read the DMARC specification (RFC 7489).

Common Uses for a DNS Lookup

• Launch checks: confirm a new domain resolves to the right server.
• Migrations: verify nameserver and IP changes after moving hosts.
• Email setup: validate MX, SPF and DMARC before sending campaigns.
• Security reviews: spot dangling CNAMEs and unexpected TXT entries.
• Site verification: confirm a TXT token is published for search and analytics tools.

Why DNS Changes Take Time to Propagate

Resolvers cache each answer for the record’s Time To Live (TTL). Until that timer ends, some users still see the old value. Lowering the TTL a day before a planned change makes the switch faster. Cloudflare’s explanation of DNS covers the caching model, and Google’s DNS-over-HTTPS JSON API documents the interface this tool uses. If the two resolvers here disagree, one is simply holding an older cached answer.

Troubleshooting Tips

• NXDOMAIN: the name does not exist. Check spelling and registration.
• No records: the name exists but has nothing of that type.
• Old values: wait for the TTL, then look up again with the other resolver.
• Email failing: run the email health check and fix any red items first.

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Frequently Asked Questions