DNS lookup tool to find MX, NS, SPF and more records | WhoisXML API

Use our DNS lookup tool to find all of the DNS records of a specific domain

Learn about the entire DNS infrastructure of a domain name, such as the IP address it resolves to from more than 50 DNS records to get a complete picture.

1.2 billion+Domains and subdomains
142,703,533MX records updated daily
196,463,291NS records updated daily
99.5%IP addresses in use covered

What is a DNS lookup tool?

A DNS lookup tool is a means by which users can get access to the corresponding IP address and Domain Name System (DNS) records of any given domain name. Said lookups are useful to uncover a domain’s infrastructure and possible attack vectors.

What Is a DNS Lookup

Why check MX, NS, SPF, etc. records with our DNS lookup tool?

  • Easy to use

    With just a domain name on hand, a DNS lookup lets users gather all connected records listed in a shareable report via a permanent URL, detailing DNS type/RRset, time to live (TTL), and other relevant strings.

  • Comprehensive

    Our DNS lookup tool reveals domain names’ many record types, including A, mail exchanger (MX), nameserver (NS), Start of Authority (SOA), TXT, and dozens of others.

Protect networks from DDoS attacks and other threats

Protect Yourself from DDoS Attacks and Other Threats

Protect Yourself from DDoS Attacks and Other Threats

  • A DNS lookup can let you quickly check if all your records are correct or have been possibly changed without your knowledge, hence making you prone to distributed denial-of-service (DDoS), email fraud, and other attacks.
  • Add context to a suspicious domain name and look for anomalies in its DNS records, including an IP address or an NS or MX record that has recently been flagged as malicious and recommended for blocking.

Improve penetration testing efforts

  • Learn more about your network infrastructure and detect vulnerabilities that potential attackers can exploit.
  • Identify stale DNS records that may remain accessible in your network with DNS Lookup’s help because these can serve as attack points if not taken down.
Improve penetration testing efforts
Supplement other business strategies

Supplement other business strategies

DNS Database Download

Check our extensive passive DNS database

Our DNS database covers all of the historical DNS connections between 2B+ hostnames and IP addresses. Downloads are available as properly parsed MySQL and CSV files.

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DNS Lookup | WhoisXML API

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