Domain Research Suite | Search & Monitor Tools | WhoisXML API | Domain Research Suite | WhoisXML API

Our Domain Research Suite (DRS) is a web-based enterprise-grade solution to search and monitor domain data.

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Find domains containing specified search terms in their WHOIS records

Reverse WHOIS Search helps you find all the domain names corresponding to a particular search term such as a person’s or company’s name, phone number, email address, or any other detail in a WHOIS record.

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Reverse WHOIS Search

Look into domain ownership history with WHOIS History Search

Get a 10-year perspective on domains of your interest and view all relevant historical WHOIS records.

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WHOIS History Search

Get all the key ownership data points of domain names

WHOIS Search allows you to obtain registration and ownership data for domain names and their IP addresses from WHOIS records.

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WHOIS Search

Find all the domains associated with DNS records

Reverse DNS Search is a fast and reliable way to get a list of all domains hosted on the same IP address, mail server, and nameserver.

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Reverse DNS Search

Can you register a domain right away?

Domain Availability Check is an accurate, real-time, and user-friendly tool that can answer that question.

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Domain Availability Check

Find all domains and subdomains of interest

Get a list of all active domains and subdomains that contain your brand or any trademarked or copyrighted term.

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Domains & Subdomains Discovery

Be the first to know about domain name events

Use Domain Monitor to check all happenings around domain names you want to investigate, track, or purchase.

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Domain Monitor

Check what registrants are up to

Monitor all the moves made by registrants of interest. Be alerted every time they register or drop a domain name or change its status.

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Registrant Monitor

Monitor specific keywords associated with your brand

Keep an eye on domain name registrations that contain your branded and trademarked terms. Catch abusers before they can cause you harm.

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Brand Monitor
10.1+ billion Historic WHOIS Records
582+ million Domains tracked
2,864+ TLDs tracking
10+ years of data crawling
What isDomain ResearchSuite?

Domain research tools that fit your needs

Brand managers

Protect your brand from infringement, phishing attacks, and other nefarious activities that could affect the brand you are managing or check on your competitors.


Assess a domain name’s worth using accurate and timely data obtained from its WHOIS record.

Cybersecurity specialists

Precise and exhaustive data is vital for analyzing and preventing cybercrime. For cybersecurity professionals, domain WHOIS data can reveal essential clues.


Marketing researchers try to understand what consumers want. By using domain data, they can identify various trends in the online marketplace as a whole.

Law enforcement and government agents

Those who work on the right side of the law need a place to start their investigations. Get a full portrait of malicious domain owners and their connections to other sites, companies, people, and so on.

Financial organizations

Use domain ownership data to identify and prevent fraudulent transactions, invoice scams, and identity theft.

Try API integration

You can opt to integrate our domain monitoring and research capabilities into existing platforms instead via API calls. Harness the power of our ready-to-use APIs to obtain access to our extensive WHOIS database using direct queries.

Customer success stories

WhoDat Project: an Interactive Pivotable Tool for Working with WHOIS Data

As the analysis and research of WHOIS data is crucial in cybersecurity, the MITRE cooperation develops a front-end for the services provided by WhoisXML API in support of researchers' and analysts' work...

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DNS Forensics Using the Big Data Extension of IBM’s QRadar Security Intelligence Platform

The basis of IBM’s key security solutions is the QRadar Security Intelligence Platform, a security information and event management system (SIEM). It is a unified platform covering many security-related tasks and incorporating a broad spectrum of solutions including the use of X-Force Threat Intelligence, IBM’s cloud-based threat intelligence platform.

The big data extension of QRadar can be used to do DNS forensics in order to identify risky domains, risky users, and risky IP addresses, and feed this information back to QRadar in order to define new protection rules...

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Easily Managing Hundreds of Domain Names from Salesforce

IEEE was searching for a solution to automate its manual process of ensuring hundreds of independently-owned IEEE domain names were being updated with their latest information in the WHOIS Domain Name Registry. More specifically, there was a critical need of identifying upcoming domain name expirations early in order to alert their owners of potential losses...

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Dark Crawler, a Useful Tool to Assess Child Exploitation from Online Communities

Child sexual offenders have always been quick to adapt technological advances, such as photography and film for the purposes of exploiting children. The move of child exploitation material (CEM) to the Internet has enabled them to form online communities which allow easier access to CEM, recruiting co offenders and business partners, as well as validating their deviant behavior amongst other offenders.

Despite the established harm inherent within child exploitation imagery and distribution online, current attempts to limit such content have been largely unsuccessful.

Dark Crawler is a tool used by search-engines to automatically navigate the Internet and collect information about each website and webpage which can be used to seek out specific content, such as child exploitation material ...

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Whois Data Opening up a New Avenue
for the Measurement of Entrepreneurship

Entrepreneurship is the central process through which economic growth and performance is fostered in a regional economy. Its evaluation is thus of paramount importance for policymakers and economists. However, the quantification of entrepreneurship, that is, introduction of measures to describe the attempts to start growth-oriented business, the likelihood of their success, the ability to raise venture capital, etc. is a challenging task due to the lack of globally available and accurate input data on e.g. business registration.

In a recent working paper a new approach is proposed to overcome this issue by using WHOIS registration data. The approach is applied to companies in Oxford and Cambridge, UK as a demonstration, by using data purchased from WhoisXML API.

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Malicious URL Detection via Machine Learning

Protection against malicious websites is an important task in cybersecurity. A common way of identifying such sites is the use of blacklists which contain a large set of URLs considered dangerous. There are various techniques for compiling such lists, and there is obviously a need for methods to verify if a suspicious site is really dangerous...

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Is a HTTPS Webpage as Secure as Expected?

Encrypted communication on the Internet is most commonly realized by Secure Sockets Layer (SSL) and Transport Layer Security (TLS). Webpages communicating sensitive content, including Internet banking, webshops, etc. use the HTTPS protocol which is based on this. E-mail servers, when communicating with clients in a secure manner, use the relevant e-mail transfer protocols such as SMTP, IMAP or POP3 over SSL/TLS.

In current practice web pages are often hosted at least in part by third-party hosting providers or content-delivery networks. Thus the hardware systems we communicate with belong to these third parties, which may host many other pages of completely different entities. And, in order to establish desired secure communications, these parties have to get hold of private keys of these entities. Currently, many providers overtake even the management of keys from their clients which gives rise to profound and possibly severe security implications...

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WHOIS Data for Vulnerability Notifications

One of the cornerstones of cybersecurity is threat intelligence sharing. Maintenance of our IT systems' security and their protection against malicious activity require up-to-date knowledge of the entire field. There are significant efforts to assist experts in this activity, including those of market leaders such as IBM X-Force Exchange.

Due to the decentralized architecture of the Internet, however, the collaboration of the actors as well as voluntary campaigns in order to detect vulnerabilities are also of utmost importance. If, however, the owners of the affected systems cannot be notified, these efforts can hardly achieve their positive goal. And in this notification process, WHOIS data have their use...

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The WPAD Name Collision Vulnerability in the New gTLD Era: a Threat Crying for Urgent Solution

Sometimes certain comfortable and seemingly innocent protocols can introduce significant security risks, especially when the system's environment changes.

The WPAD (Web Proxy Autodiscovery) protocol is prevalently used to configure the web proxy settings of end systems such as desktops and other devices belonging to an administrative domain, e.g. a corporate network. The benefit of this solution is that system administrators can deploy local web proxy settings essentially without any user interaction. Due to a very progressive change in the domain registration policies, the otherwise very useful WPAD protocol has introduced the possibility of a new and very dangerous man-in-the-middle attack...

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Want to learn more?

5 Powerful Use Cases of Domain Research and Monitoring Tools

In today’s business landscape, it is almost impossible to be successful without setting up an online presence. What’s more, if you are launching a company or product, thinking about which domain name to use is a priority. In fact, it cannot be randomly picked as you must deeply connect with your target audience. But the domain registration market is highly dynamic, and it is advisable to secure domains of interest before someone else does. How can you do that?

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Monitoring Newly Registered Domains

The first line of defense for companies that want to protect their staff or customers from bogus websites is monitoring domain names. Hackers will use variations of domain names to lure unsuspecting users onto portals whose purpose is to steal private information and drop viruses onto devices.

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Tracking Domains for Cyber Self-Defense

In 2008, hackers hijacked, which provided online bill payment services and redirected traffic to a website in Ukraine. The fake CheckFree website downloaded malware on CheckFree customers’ computers. The malware stole usernames and passwords. Even worse, it infected the computers of customers of minor banks that had partnered with CheckFree. The banks’ websites had been directing their users to CheckFree.

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