What Is Bulk WHOIS Lookup And How It Works ?

Get domain ownership information and whois data records from our parsed whois database with a single query. Just upload the list of domain names in the bulk request. You will receive an email with a link to download the result in CSV format.


large data

Large No. of Domains

Get the complete WHOIS data records information for a large number of domain names in a single bulk whois lookup request.

simple to use

Really Simple to Use

Just upload a txt file containing the list of domain names and download the result in CSV format.


Informative Data Points

Get informative data points of domains such as domain registrant name, organization, email address, registration address, registrar information, creation date, expiration date, updated date, domain availability, domain age, and many more.

well parsed

Well Parsed and Normalized

Whois domains information is well parsed and normalized to a compatible format for easy integration with your business processes. It covers all domains, subdomains and TLDs as well.

Common Use Cases

Cyber Security & Payment Processors

Cyber Security researchers use bulk Whois lookup for investigating cybercrime. Payment processors and banks use Bulk Whois lookup to detect transaction fraud.

cyber security

Marketing Research

Marketing researchers use bulk Whois lookup to find domain details either for specific brand purpose or otherwise.

Intellectual Property Protection

Brand agents use bulk WHOIS lookup to protect their intellectual property and trademark infringements, eliminate domain name similarities, duplicates, or copyrights.

Intellectual Property

Law Enforcement Agencies

Law enforcement agencies depends on bulk Whois lookup for background checks in investigations.


How can I request WHOIS information for thousands of domains?

You can request WHOIS information for thousands of domains using bulk whois domain lookup service with both an API and a user-friendly web interface for batch processing of upto 3 million domains. You can also use bulk whois domain lookup UI tool powered by bulk whois API. Here are the key features of the API and web interface:

Bulk WHOIS Lookup API:

  • Efficient Querying: Query up to 100 domains in a single request for speedy results.
  • Structured Data: Receive query results in popular XML and JSON formats, providing both parsed fields and raw texts.
  • Normalized Data: All WHOIS information is consistently parsed and normalized, making integration with your business processes seamless.

Bulk WHOIS Checker Web Interface:

  • Batch Processing: Support for a minimum of 101 domains up to a whopping 3 million domains in a single file upload.
  • Convenient Notifications: You'll be notified via email when the crawl is complete, with a download link for output files.
  • Data in CSV Format: Output files are delivered in compressed CSV format, containing all the essential WHOIS information.