WHOIS Lookup via a domain, email, or IP address | WhoisXML API (2024)

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?

  • 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).

  • 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.

  • 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.

  • 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

  • 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.

  • 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.

  • 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.

  • 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.

  • 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.

  • 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.

  • 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.

  • 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.

  • 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

WHOIS Lookup via a domain, email, or IP address | WhoisXML API (1)

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WHOIS Lookup via a domain, email, or IP address | WhoisXML API (2)

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.”

WHOIS Lookup via a domain, email, or IP address | WhoisXML API (3)

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.”

WHOIS Lookup via a domain, email, or IP address | WhoisXML API (4)

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.”

WHOIS Lookup via a domain, email, or IP address | WhoisXML API (5)

Yannick Delsahut

CEO

Goldstark

“I appreciate your products that are useful for checking domain expiration dates.”

WHOIS Lookup via a domain, email, or IP address | WhoisXML API (6)

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.”

WHOIS Lookup via a domain, email, or IP address | WhoisXML API (7)

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.”

WHOIS Lookup via a domain, email, or IP address | WhoisXML API (8)

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.”

WHOIS Lookup via a domain, email, or IP address | WhoisXML API (9)

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.”

WHOIS Lookup via a domain, email, or IP address | WhoisXML API (10)

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.”

WHOIS Lookup via a domain, email, or IP address | WhoisXML API (11)

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.”

WHOIS Lookup via a domain, email, or IP address | WhoisXML API (12)

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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WHOIS Lookup via a domain, email, or IP address | WhoisXML API (2024)

FAQs

What is the WHOIS API for IP address? ›

The Whois Lookup API provides the ownership record for a domain name or IP address with basic registration details. The API is optimized to respond quickly and is designed to handle a high volume of parallel requests.

Is WHOIS API free? ›

Because WHOIS information is public, there are several APIs that allow a connection at no cost. For example, the WHOIS XML API provides contact information for free. APIs with advanced features may charge a fee, but they often have a freemium package for basic use.

How to find out who owns an email domain? ›

The Whois database can provide you with details such as a domain's current owner, its availability and its expiration date. With Whois info, you'll be able to check who owns a domain, find the domains that are right for you, and get one step closer to securing them.

What is the difference between DNS lookup and WHOIS lookup? ›

A Domain Name lookup (also called WHOIS) retrieves the domain registration data, including the domain owner details. There is a difference between a Domain Name Server (DNS) lookup and a Domain Name lookup. A DNS lookup retrieves the IP address associated with a Domain Name.

What is API in IP address? ›

The Public IP Address API is a quick and straightforward solution for identifying the public IPv4 and IPv6 addresses of customers who are accessing your services. Additionally, it includes proxy detection capabilities by analyzing the X-Forwarded-For (XFF) HTTP header field.

How accurate is the IP API? ›

The accuracy of IP geolocation APIs can vary depending on the service provider and the method used. However, most reputable providers offer accuracy rates of around 95% or higher at the country level and around 50-80% at the city level.

How to get WHOIS API key? ›

Locating your API Key

Click the View API key link under the API Key section. Your unique API Key will be displayed in a pop-up window over a secure connection. You may generate a fresh API Key by clicking the Regenerate link.

Where can I get API for free? ›

Top 15 Free Data APIs
  1. Crunchbase. Build powerful applications and integrate Crunchbase into your web and mobile applications.
  2. Web Search. Get a list of relevant results from a search query that includes images, news, and related searches.
  3. GeoDB Cities. ...
  4. Google Play Store. ...
  5. Weather. ...
  6. Whois Lookup. ...
  7. WordsAPI. ...
  8. Referential.

Is Google address lookup API free? ›

The Address Validation API uses a pay-as-you-go pricing model. Along with the overall Google Terms of Use, there are usage limits specific to the Address Validation API.

How to trace an email address to its owner for free? ›

Some of them include:
  1. IP2Location. IP2Location allows you to input the email header into its search bar to discover your sender IP address. ...
  2. IP-Lookup.net. IP-Lookup.net is another free tool to discover your sender's IP address. ...
  3. IP-Tracker.org. IP-Tracker.org can also provide your sender's IP address.
May 14, 2024

How to figure out who owns a domain? ›

How to find out who owns a domain
  1. Navigate to the WHOIS database.
  2. Search for the domain name URL.
  3. Detect if the contact information is private.
  4. Find registrant contact information.
Jun 13, 2024

What are WHOIS tools? ›

WHOIS (pronounced as the phrase "who is") is a query and response protocol that is used for querying databases that store an Internet resource's registered users or assignees.

What is the purpose of the WHOIS lookup? ›

WHOIS helps to democratize the Internet. Anyone, from businesses and corporations to law enforcement and individual users, can access and use the WHOIS database to find out who is behind a domain name and any associated website.

What is a reverse lookup domain name? ›

A reverse DNS lookup is a DNS query for the domain name associated with a given IP address. This accomplishes the opposite of the more commonly used forward DNS lookup, in which the DNS system is queried to return an IP address.

How do I trace a DNS lookup command? ›

Access your command prompt. Use the command nslookup (this stands for Name Server Lookup) followed by the domain name or IP address you want to trace. Press enter. This command will simply query the Name Service for information about the specified IP address or domain name.

What is the WHOIS record API? ›

WHOIS API is a consumption model variant that gathers a variety of domain ownership and registration data points from a comprehensive WHOIS database. Developers can integrate WHOIS API into existing internal systems and commercial applications using client libraries and integration modules.

How to find who owns an IP address? ›

To find an IP address' owner you must use a WHOIS lookup tool, which is essential for getting the IP's registration details. For official and detailed information, you can use the RIPE NCC WHOIS lookup.

What is your IP info API key? ›

API Access Key & Authentication

After creating an account, you will be assigned a API access key, a unique hash consisting of 32 characters that will allow you to authenticate with the ipinfo API interface. To do this, simply append your API access key to the API's base URL using the access_key parameter.

Is IP geolocation API free? ›

Ipgeolocation is another web service that provides geolocation information corresponding to IP address free of charge. It has an infrastructure that can provide geolocation information in JSON and XML format. Ipgeolocation API provides detailed information about the location corresponding to the IP address.

References

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