Discover all active domains and subdomains containing your search term
Our Domains & Subdomains Discovery web service lists all domains and subdomains as part of our complete Domain Research Suite (DRS).
Get Started![Domains & Subdomains Discovery](https://drs.whoisxmlapi.com/images/domain-monitoring-research/tools/domains-subdomains.jpg?v3)
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.
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.
Enjoy priority data access with our premium API services topped with extra perks including dedicated team support, enterprise-grade infrastructure, and SLAs for full scalability and high performance.
Unlock integrated intelligence on Internet properties and their ownership, infrastructure, and other attributes.
Multi-Level API User Administration Now Available - Manage individual API keys for team members in your organization.
Learn MoreDomains & Subdomains Discovery works for almost all top-level domains (TLDs), giving users extensive results to map domain footprints.
Find up to 10,000 domains and subdomains per search term within mere seconds with Domains & Subdomains Discovery.
As part of the Domain Research Suite (DRS), access to Domains & Subdomains Discovery also means access to other domain research and monitoring tools from a single dashboard.
In the software development business? You can do away with tedious data gathering and benefit from our extensive lists of domains and subdomains by integrating Domains & Subdomains Discovery API into your products.
Learn more about API integration“The WhoisXML History API has been a game changer for our online investigations, trainings, and books. We have uncovered the true owners behind numerous malicious domains, even though they currently possess "private" Whois registration.”
“Whois XML is one of the most important tools we use for domain intelligence in the Bachelor's Degree program in Investigation and Security Sciences at the University of Perugia. In particular, we appreciate the reverse research from IP to Domain and Whois with query filters. The tool is comprehensive, providing detailed information such as phone numbers, names, and other details from Whois records. While many Whois records are now covered by privacy regulations, WhoisXML API provides access to all historical WHOIS records.”
“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.”
“The consistent and structured data provided by WhoisXML API made it possible to group and identify who is behind suspected fraudulent websites, being able to search by phone number, address or e-mail address used in the domain registration.”
“I appreciate your products that are useful for checking domain expiration dates.”
“WhoisXML API is amazing for checking out the historic registration information of a domain, pivoting to locate the alternate registrations with the same details and also my cyber investigations. The data proved very useful when investigating pig butchering scams and domains that host child abuse material.”
“DRS is a Great product, easy to use and everything I need in one place.”
“Very useful for investigations, we can go back in history and see when domains were registered and who owned them at a certain time.”
“WhoisXML API builds out data sets that help users correlate attack infrastructure with related IP and WHOIS information.”
Subscribing to DRS instantly gives you access to Domains & Subdomains Discovery.
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