Provide current and historical ownership information on domains / IPs. Identify all connections between domains, registrants, registrars, and DNS servers.
Look into all current and historical DNS / IP connections between domains and A, MX, NS, and other records. Monitor suspicious changes to DNS records.
Get detailed context on an IP address, including its user’s geolocation, time zone, connected domains, connection type, IP range, ASN, and other network ownership details.
Access our web-based solution to dig into and monitor all domain events of interest.
Get access to a web-based enterprise-grade solution to search and monitor domain registrations and ownership details for branded terms, fuzzy matches, registrants of interest, and more.
Detect and block access to and from dangerous domain names before malicious actors can weaponize them. Contact us today for more information.
Unlock integrated intelligence on Internet properties and their ownership, infrastructure, and other attributes.
Our complete set of domain, IP, and DNS intelligence available via API calls as an annual subscription with predictable pricing.
Offers complete access to WHOIS, IP, DNS, and subdomain data for product enrichment, threat hunting and more.
Multi-Level API User Administration Now Available - Manage individual API keys for team members in your organization.
Learn MoreReverse DNS API lets you search for domain names connected to an SOA, a TXT, or a CNAME record with outputs in JSON and XML.
Get started500 free API credits. No credit card required.
Start with diverse DNS data points—SOA, TXT, or CNAME—and refine results using Active and Wildcard flags.
Reverse DNS API taps into our market-leading DNS database with billions of recorded DNS associations and data points.
Integrate the API into existing solutions to automate the collection of relevant DNS associations for your users seamlessly.
Detect and address issues in CNAME records and DNS configurations to mitigate threats like subdomain takeovers and malicious redirections.
Identify domains associated with specific SOA, TXT, or CNAME records to uncover hidden assets and dependencies within your DNS infrastructure.
Uncover domains with specific TXT, SOA, or CNAME records associated with threat actor campaigns, malware delivery, or phishing infrastructures.
Verify sender authenticity and uncover spam-linked domains, enhancing blacklist accuracy and email authentication.
Need bulk access to TXT, SOA, and CNAME records in your local environment? Learn more about our DNS Database Download.
Request a Quote“WhoisXML was the game changer for us. It has revolutionized our ability to disrupt cybercrime in process and at scale by quickly identifying all of the vendors providing material support for scammers using sophisticated website templates that look legitimate. By quickly identifying the vendors unknowingly supporting the criminals, we can provide them with public interest justification to burn down the criminal infrastructure.”
Get free access to our API. 500 free credits. No credit card required.
We are here to listen. For a quick response, please select your request type. By submitting a request, you agree to our Terms of Service and Privacy Policy.