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.
We are really excited to announce that we are now offering our hallmark Whois via a command-line utility, “bestwhois”. This tool can be a great alternative to the standard “whois” command for domain and IP WHOIS queries, as there are no search restrictions and the queries are made through the API service provided by WhoisXML API.
The foundation of a domain’s existence on the Web is its credibility. It must be secured at all costs because it’s constantly under threat from malicious elements that are out there staging. As such, domain protection is an indispensable component of overall cybersecurity efforts because not just business viability but a domain’s very own survival is at stake.
A company can protect its domain in different ways. For one, it can initiate its own in-house solution which would require substantial expertise and investment to put in place. Another option is to delegate the responsibility to experienced specialists dedicated to providing brand and digital protection services.
With thousands of new domain names registered every day, billions and billions have been registered over the years. And these have undergone multiple ownerships or even registration changes over time. These could be modifications to the domain’s registrar or associated name servers or even changes in contact details, to name just a few.
Aging domains have a history and we at WhoisXML API can help you delve deeper to understand a given domain’s past with WHOIS History API. Professionals conducting research for cybersecurity or investment purposes can hugely benefit from uncovering a domain’s lifecycle to find out if it has ever had a checkered past or draw connections that may not be easy to see at the surface level.
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