Gather all the registration information from a domain’s or an IP address’s corresponding WHOIS records. Test our lookup now.
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Why use WHOIS Lookup?
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Ample reach across TLDs
WHOIS Lookup contains the records of over 374 million currently active domains spanning more than 7,596 generic (gTLDs) and country-code top-level domains (ccTLDs).
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Readily available and easy to use
WHOIS Lookup reports are parsed and normalized so professionals can easily access and make sense of the information they provide. Query results are available in seconds for faster decision-making.
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Shareable results
WHOIS Lookup’s domain search query results come with custom URLs that users can readily share with relevant parties with just a few clicks.
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Fresh and accurate data
We gather and refresh data in near-real-time so users can act on the most recent WHOIS insights on domain names and IP addresses of interest.
Practical usage
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Search WHOIS records to detect cybercriminal activities
Threat detection specialists, digital forensics & incident response (DFIR) teams, or even non-technical users can use WHOIS lookups to find out more about domain names, IPs, and email addresses. Suspicious hosts and their WHOIS records can be investigated further to reduce the risk of malware-driven and phishing-led attacks.
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Make WHOIS lookups part of your MDR efforts
WHOIS Lookup lets external cybersecurity consultants, including managed detection and response (MDR) firms quickly check for unknown domain names and IP addresses entering their clients’ networks. These may be used for spamming, spoofing, and other domain-related attacks. Service providers can also use the tool to update their blocklists with reliable WHOIS data.
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Support law enforcement efforts
Law enforcement agencies can rely on WHOIS Lookup to quickly check if a particular domain name’s registration details share patterns with known or emerging online criminal networks. WHOIS History can also give them a historical perspective on domain ownership.
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Search for the right domain name investments
Domain investors and brokers can use WHOIS Lookup to get an overview of a web domain’s availability and current ownership information.
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Facilitate domain transfers
Domain brokers and registrars can double-check a domain name’s latest details and verify ownership before finalizing a sale and proceeding with the domain transfer.
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Anticipate product launches and entrepreneurial moves
Conducting regular WHOIS domain and website searches can give business professionals an edge as new web name registrations may be indicative of competitors’ future product launches or international expansions.
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Detect fraudulent payment requests
Users can check the credibility of a person’s email address for telltale signs of spoofing and business email compromise (BEC) fraud, such as very recent registration, too frequent updates, or other anomalies.
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Protect your brand with an adequate website and domain search
Users can benefit from WHOIS Lookup’s outputs to investigate possible instances of brandjacking and typosquatting as well as prepare for Uniform Domain-Name Dispute Resolution Policy (UDRP) cases.
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Start off new business relationships on the right foot
Business professionals can use the information contained in WHOIS records to carry out background checks on new suppliers, customers, and partners before committing to contractual agreements or putting in large orders.
Bulk WHOIS Lookup can help you search domain names faster
Easily upload domain lists in a file or as text and execute WHOIS lookups in bulk for faster results.
Learn more about Bulk WHOIS Lookup
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Michael Bazzell
Owner
IntelTechniques
“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.”
Flavio Critelli
Distinguished Professor of Digital Forensics
University of Perugia
“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.”
Michael Roberts
Founder & Private Investigator
Rexxfield
“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.”
Loonie Reed
Certified Fraud Examiner and Computer Forensic Examiner
“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.”
Yannick Delsahut
CEO
Goldstark
“I appreciate your products that are useful for checking domain expiration dates.”
Christine Bejerasco
Senior Analyst
F-Secure Corporation
“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.”
Rich Sutton
VP of Engineering
Proofpoint
“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.”
Mohammad Ismail Daud
Student
UC Davis
“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.”
Kieran Kennedy
Head
Snowflake Marketplace
“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.”
Larry Cameron
President and Founder
Paradigm Intelligence Ltd
“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.”
Jacob Waltz
CEO/Founder
Intraframe
“Very useful for investigations, we can go back in history and see when domains were registered and who owned them at a certain time.”
David Pearson
CEO/Founder
Bayse Intelligence
“WhoisXML API builds out data sets that help users correlate attack infrastructure with related IP and WHOIS information.”
Premium API Services
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.
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Enterprise API Packages
Our WHOIS data is only a part of the intelligence we make available in API form. WhoisXML API offers annual subscriptions priced based on query volume, so you no longer have to worry about running out of credits to fulfill business requirements.
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