Use WHOIS Lookup to Search Domain Names and IP Addresses

Get key data points for domains, including Registrant name, organization, e-mail address, registration address, registrar information, creation date, expiration date, updated date, domain availability, domain age, and even more.

Why WHOIS Lookup

  • Ample reach across TLDs

    WHOIS Lookup is powered by about 400 million currently active WHOIS records for more than 2,864 generic top-level domains (gTLDs) and country-code top-level domains (ccTLDs).

  • Ready and easy to use

    WHOIS Lookup reports are parsed and normalized such that professionals can easily access and make sense of the information. Query results are available in seconds for faster decision-making.

  • Recent and accurate

    WHOIS Lookup’s domain search query results come in preview HTML mode as well as JSON and XML formats. Users can also share hosted reports with relevant parties in a few clicks.

  • Recent and accurate

    We gather and refresh our data in near-real-time so that users can act on the most recent WHOIS insights regarding domain names and IP addresses of interest.

Practical Usage

  • Search WHOIS records to detect cyber criminal 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 a part of managed detection and response (MDR) efforts

    WHOIS Lookup lets external cybersecurity consultants and managed security firms quickly check for unknown domain names and IP addresses entering their clients’ networks and that may be used for spam, 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.

  • 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 to 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 a background check on new suppliers, customers, and partners before committing to contractual agreements or 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 | Whois XML API

Get 500 free credits monthly. No credit card required.

Get started

Trusted by
the smartest

Enterprise API Packages

API access through WhoisXMLAPI can be purchased as an annual subscription. The access pricing is based on the number of queries, which is measured monthly with per-minute rate limits. The pricing structure gives predictability to business planning and solution architecture.

Learn more
Have questions?

We work hard to improve our services for you. As part of that process, we welcome your feedback, questions, and suggestions. Please let us know about your thoughts and feelings, and any way in which you think we can improve our product.

For a quick response, please select the request type that best suits your needs. For more info regarding the request types, see Contact us page.

By submitting, you agree to the Terms of Service and Privacy Policy.

Or shoot us an email to