Unified & consistent WHOIS data

Our hosted WHOIS Web service provides the registration details, also known as the WHOIS record, of a domain name, an IP address or an email address. All of the WHOIS information we offer comes both well-parsed and normalized to a consistent format so it can easily fait in with your business operations.

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500 free requests monthly. No credit card required.

582M+Domains tracked
52K+Satisfied customers
7.0 Billion+WHOIS records

Our hosted WHOIS web service

  • Comprehensive across TLDs

    Get access to over a billion active WHOIS records for both domains and subdomains across 2,864+ gTLDs and ccTLDs.

  • Unified and fit for purpose

    Our well-parsed and normalized WHOIS data can quickly be integrated into different internal systems to speed up its use by various stakeholders.

  • Handy

    The query results with both parsed fields and raw texts are returned in commonly-used XML and JSON formats.

  • Reliable and current

    Our WHOIS data is gathered in near-real-time, giving users exclusive access to accurate and updated information for better decision-making.

Practical usage

Cybercrime prevention

Digital forensics and incident response (DFIR) and other cybersecurity consultants can rely on WHOIS API to provide clients with easy-to-read lists of domains that may have ties to cybercrime, thus allowing them to enhance their cyber defense. This information could be particularly useful in mitigating phishing and other malware-enabled attacks.

Cybercrime prevention

Investigating & curbing cybercrime

Infosec professionals can work with WHOIS API to enhance their solutions and services and protect users against spam, dangerous websites, network infiltrations, and other online misdeeds.

Law enforcement

Law enforcement agents can use WHOIS API as a tool during their investigations to find IP addresses, websites, and domains sharing attributes with criminals’ online networks.

Domain changes monitoring

Domain changes monitoring

Domainers use WHOIS API to check domain names availability and to track domain registration changes. They can see all historical changes to particular domains with a simple search while the monitoring functionality lets them stay updated on the most recent domain changes.

Domain appraisal

Domain investors use the information gained from WHOIS searches to learn about their competition and to identify investment opportunities.

Domains transfer

Registries, registrars and domain brokers use WHOIS API to ensure reliable and secure domain name ownership transfer and management.

Payment processing

Payment processors and banks use WHOIS API to detect transaction fraud by spotting anomalies in customer information to flag down potential malicious acts.

Payment processing
Social sciences

Marketing research

Market researchers can use WHOIS API to obtain more insights into their user base with statistical analyses helping them create better marketing strategies and campaigns, focus on the right customers, and cater to formerly untapped markets.

Brand protection

WHOIS data enables brand agents to spot potential acts of trademark infringements like blatant domain name similarities, copycats, and duplicates.


Website owners and managers use WHOIS API to gather the contact details available in WHOIS records, possibly leading to exciting business opportunities and partnerships.

Get access to a precise and relevant WHOIS Database

The database we provide is available in the formats of CSV and MySQL dump for easy integration into your platform.

Learn more about WHOIS Database

Simplify your work

WHOIS API Splunk application tutorial WHOIS API WordPress plugin bestwhois - a command-line whois-like client

We provide extensions for the major open source threat intelligence platforms. Integrate WHOIS API into your application in minutes.

Go to integrations

Get 500 free credits monthly. No credit card required.

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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.

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Have questions?

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