An A record maps a domain name to an IPv4 address. It is the most fundamental DNS record — when a browser looks up a domain, it uses the A record to find the server IP to connect to.

What is a CNAME record?

A CNAME (Canonical Name) record maps one domain name to another. For example, www.example.com might CNAME to example.com, redirecting all lookups for the www subdomain to the main domain.

What is an MX record used for?

An MX (Mail Exchange) record specifies the mail server responsible for accepting email for a domain. Each MX record has a priority value — lower numbers indicate higher priority.

What is a TXT record used for?

TXT records hold arbitrary text data associated with a domain. Common uses include SPF (email sender policy), DKIM (email signature keys), DMARC (email policy), and domain ownership verification for Google Search Console and SSL issuers.

What does TTL mean in DNS?

TTL (Time To Live) is how long, in seconds, a DNS record can be cached by resolvers before they must re-fetch it from the authoritative server. A lower TTL means changes propagate faster but increases DNS query volume.

DNS Lookup — Free Online DNS Record Checker (A, MX, TXT, CNAME)

DevTool House

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DNS lookup

About DNS Lookup

Query all common DNS record types for any domain — A, AAAA, MX, CNAME, TXT, NS, and SOA — to verify DNS configuration, debug email delivery, and check domain propagation.

Last reviewed

June 23, 2026

Key Features

Supports A, AAAA, MX, CNAME, TXT, NS, and SOA record types
Returns all records for the selected type with TTL values
Useful for email (MX) and domain verification (TXT) checks
Shows TTL values and record data clearly
Instant results without needing dig or nslookup locally

How to Use DNS Lookup

1Enter the domain name you want to query.
2Select the DNS record type (A, MX, TXT, CNAME, etc.).
3Run the lookup and review the returned records and TTL values.
4Use the results to verify DNS setup, debug email routing, or confirm propagation.

Email delivery debugging example

If email delivery is failing, look up the MX records for the domain to confirm they point to the correct mail server. Then check TXT records for SPF and DKIM entries that control email authentication.

How It Works

The tool performs a DNS query through the DevTool House API service and returns the records for the requested type along with their TTL values and associated data.

Privacy Notes

The domain you enter is sent to DevTool House servers, which query public DNS resolvers for its records. It is not stored once the result is returned, and no account is required.

Limitations

Results reflect DNS data as seen from the resolver at query time. DNS propagation can take minutes to 48 hours, so records seen here may differ from other resolvers during propagation. Cached TTL values may also affect freshness.

Frequently Asked Questions

DNS lookup

About DNS Lookup

Query all common DNS record types for any domain — A, AAAA, MX, CNAME, TXT, NS, and SOA — to verify DNS configuration, debug email delivery, and check domain propagation.

Last reviewed

June 23, 2026

Key Features

Supports A, AAAA, MX, CNAME, TXT, NS, and SOA record types
Returns all records for the selected type with TTL values
Useful for email (MX) and domain verification (TXT) checks
Shows TTL values and record data clearly
Instant results without needing dig or nslookup locally

How to Use DNS Lookup

1Enter the domain name you want to query.
2Select the DNS record type (A, MX, TXT, CNAME, etc.).
3Run the lookup and review the returned records and TTL values.
4Use the results to verify DNS setup, debug email routing, or confirm propagation.

Email delivery debugging example

How It Works

The tool performs a DNS query through the DevTool House API service and returns the records for the requested type along with their TTL values and associated data.

Privacy Notes

The domain you enter is sent to DevTool House servers, which query public DNS resolvers for its records. It is not stored once the result is returned, and no account is required.

DNS Lookup

About DNS Lookup

Key Features

How to Use DNS Lookup

Email delivery debugging example

How It Works

Privacy Notes

Limitations

Frequently Asked Questions

1What is an A record?

2What is a CNAME record?

3What is an MX record used for?

4What is a TXT record used for?

5What does TTL mean in DNS?

DNS Lookup

About DNS Lookup

Key Features

How to Use DNS Lookup

Email delivery debugging example

How It Works

Privacy Notes

Limitations

Frequently Asked Questions

1What is an A record?

2What is a CNAME record?

3What is an MX record used for?

4What is a TXT record used for?

5What does TTL mean in DNS?