WhoisXML API Alternatives

WhoisXML API since 2005. Formerly WhoisAPI Inc. Coverage: 600+ TLDs, historical snapshots since 2005, threat intelligence, DNS, subdomain enumeration. Pro plans: $49-$2,500/mo by volume.

• Russian-language support + ruble billing
• Just WHOIS without a monthly fee
• Working with .ru/.рф/.su — Enterno goes deeper via ccTLD registries
• Need 15-year historical WHOIS — only WhoisXML has it

If you're searching for reliable WhoisXML API alternatives in 2026, consider using DomainTools, WhoisLookup, or IPinfo. These tools provide comprehensive domain and WHOIS data, competitive pricing, and robust features for domain monitoring and analysis. Each alternative offers unique capabilities, such as bulk WHOIS lookups and real-time data integration, making them suitable for various use cases in the web infrastructure landscape.

When evaluating alternatives to the WhoisXML API, several options stand out for their features, scalability, and integration capabilities. Here’s a detailed overview of some of the leading alternatives:

• DomainTools: Known for its extensive historical WHOIS data, DomainTools offers advanced analytics and robust security features. With APIs that allow for bulk queries, you can easily extract WHOIS information for thousands of domains in one go.
• WhoisLookup: This tool provides a user-friendly interface for querying WHOIS data. It supports multiple TLDs and offers both individual and bulk lookup options. Its RESTful API is designed for seamless integration into existing systems.
• IPinfo: While primarily focused on IP geolocation, IPinfo also offers WHOIS data services. Its API provides detailed information about IP addresses, including WHOIS records, making it ideal for cybersecurity and network management applications.

These alternatives not only provide WHOIS data but also enhance your capabilities in domain monitoring, risk assessment, and competitive analysis.

To illustrate how to utilize an alternative API for WHOIS lookups, let’s take DomainTools as an example. Below is a step-by-step guide to performing bulk WHOIS lookups using their API:

1. Step 1: Get Your API Key - Sign up for DomainTools and obtain your API key from your account dashboard.
2. Step 2: Prepare Your Domain List - Create a CSV file containing the domains you want to query. For example:

example1.com
example2.org
example3.net

1. Step 3: Use the API for Bulk Lookup - You can use the following cURL command to initiate a bulk WHOIS lookup:

curl -X POST "https://api.domaintools.com/v1/lookup/bulk" \
-H "Authorization: ApiKey YOUR_API_KEY" \
-H "Content-Type: application/json" \
-d '{"domains": ["example1.com", "example2.org", "example3.net"]}'

1. Step 4: Analyze the Response - The API will return a JSON response containing WHOIS data for each domain, allowing you to extract relevant information such as registration dates, expiration dates, and contact details.

By utilizing DomainTools or any of the other mentioned alternatives, you can effectively streamline your domain research and monitoring efforts, thereby enhancing your operational efficiency and decision-making processes.