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.
New gTLD Intelligence Services (NGIS)
Independent, evidence-based DNS and abuse intelligence for applicants, advisors, governments, and counsel participating in the ICANN 2026 New gTLD Program.
Predictive Threat Intelligence Feeds
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.
Security Intelligence (SI) Suite
Offers complete access to WHOIS, IP, DNS, and subdomain data for product enrichment, threat hunting and more.
Uncover entire attack surfaces with this API to embed asset discovery, vulnerability scanning, and technology metadata into your platform. Now in early access.
Talk to our APIs using LLMs. Connect your preferred LLM to WhoisXML API and simply chat about WHOIS, DNS, threat intelligence, and more.
I’m your Domain Intelligence Assistant. I make it easy to explore WHOIS, DNS, and threat data from WhoisXML API — I’m cloud-based, fast, and always ready to help.
WhoisXML API Domain Intelligence Advisor (via ChatGPT)
A custom GPT for WHOIS, DNS, IP, and threat intelligence research. Connects ChatGPT directly to WhoisXML API to enable fast, conversational investigations and domain insights.
WHOIS History Search allows you to view the ownership history of a domain. Here’s a tutorial on using the tool.
Brand Monitor allows you to track any keywords associated with your brand, trademark, or product. It tracks newly registered/modified and also recently expired domains containing all the Include terms and none of the Exclude terms in their domain name.
Reverse DNS Search allows you to retrieve domain name properties connected by DNS records. For instance, you can find web properties all hosted on a given IP address or using the same nameserver and mail server.
WHOIS Search allows you to retrieve a given domain name’s ownership, administrative, and technical information, among other details. From there, you can verify the legitimacy of a domain or pivot off certain WHOIS records to uncover current and historical connections. We’ll demonstrate how you can use WHOIS Search below.
Domain Availability Check allows you to verify the availability of a domain for registration. All you have to do is type the domain name into the search field and click Check.
Domain Monitor allows you to monitor changes in the selected domain WHOIS records and track both existing and not yet registered domains.
Domains & Subdomains Discovery Lookup allows you to identify all domains and subdomains that contain all the Include terms and none of the Exclude terms. You can discover domains only, subdomains only, or both. Also, you can specify where the search term should be placed in the domain name: start with, end with, contains, contains the word, to narrow down the results according to your needs.
As an aggregator of WHOIS, DNS, and IP data, WhoisXML API can help back up journalistic investigations with verifiable online facts about domains and websites. Researchers and media professionals can use our 9-in-1 hosted Domain Research Suite (DRS) platform to investigate suspicious domains, detect domain registration trends, keep track of the government’s or private sector’s actions towards errant websites, and more.
We are here to listen. For a quick response, please select your request type. By submitting a request, you agree to our Terms of Service and Privacy Policy.
