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.
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.
Multi-Level API User Administration Now Available - Manage individual API keys for team members in your organization.
Learn MoreDo you want to know who is behind the domains and connected IP addresses in your database? Bulk WHOIS API can retrieve all corresponding WHOIS records with a single query. Upload your existing data and download the result in CSV format.
Get started500 free API requests. No credit card required.
All data points contained in WHOIS records are made available through Bulk WHOIS API. This includes registrants’ contact information and address, registrar, and domain dates (creation/domain age, expiration, updates, etc.).
Our bulk API gives out WHOIS information in a consistent format. That way, you can readily use the results because they are compatible with your systems.
Our API gives you the flexibility to upload multiple domain lists and download separate results with unique request IDs for each file.
You don’t have to worry about compatibility. Our API returns results containing parsed and raw data in either Extensible Markup Language (XML) or JavaScript Object Notation (JSON) format.
Preventing cybercrime is one of the most challenging enterprises of our time. Staying ahead of perpetrators requires cybersecurity professionals to obtain precise and exhaustive domain data which Bulk WHOIS API can provide.
Law enforcement officials often need to verify and check domains. The WHOIS database contains vital information for legal efforts as well. Merely possessing the information is not enough, though. Being able to parse key data points with flexibility and for custom solutions is essential.
Obtaining, selling, and registering domains is easier with WHOIS data. The data itself is not enough, however. That’s why our Bulk WHOIS API is hassle-free, and of course, accurate with all relevant data points.
The sheer amount of information used by global industries is immense. A bulk WHOIS API is essential for companies operating in online arenas and willing to reinforce their existing data and systems. Domain name information can help identify complex trends in the online marketplace and enrich other sources of data.
WHOIS data gathered from Bulk WHOIS API can help you learn more about all the domains that might be using your registered trademarks without your consent.
In search of new business opportunities, partners, or customers? The WHOIS information that we provide may be just what you need. Website owners and managers can rely on WHOIS records to find and contact potential stakeholders using their details.
Payment processors and banks use Bulk WHOIS API to detect transaction fraud as it contains domain ownership information that can help spot discrepancies with the domain records of legitimate entities.
For correct validation,
the file must meet the requirements.
To make bulk usage through the API easier, read the documentation.
Read the Bulk WHOIS API docs“WhoisXML API’s rich repository of domain records will be invaluable for Cyware and joint customers, as it enables automated enrichment of domain and IP content via Cyware Orchestrate.”
“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 a responsive and reliable provider of domain intelligence. Whenever there are issues, they are quick to respond and resolve them. Working with them is smooth and straightforward.”
“WhoisXML API’s domain intelligence allows us to quickly integrate WHOIS lookups into our security heuristics and algorithms without having to worry about hosting services, staging and merging data, and the complicated task of normalization.”
“I used WHOIS API and Website Categorization API. Both tools are simple and straightforward to use. Some API providers have extra bells and whistles that they force you to use, but WhoisXML API is really easy to work with. It’s stable, and I can trust that it’s not going to flatline later.”
“Keeping track of new domain registration activity is essential in today's digital economy. We look forward to continuing our collaboration with WhoisXML API to help customer leverage critical domain insights in a secure cloud environment that aligns with their data privacy and governance requirements.”
“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.”
“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.”
Our APIs are available in an enhanced version that offers better performance with a dedicated load balancer and a premium endpoint to enable faster throttling for large-scale API deployments.
Learn moreGet the most out of API access through an annual WhoisXML API subscription. Access pricing is determined based on the number of queries made per month computed at a per-minute rate. Plan your usage according to your available resources.
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