Enter any domain and instantly discover its content categories. Powered by our database of 100 million classified domains across 59 content categories.
Free trial: 20 lookups per visitor.
See the kind of detailed categorization data returned for each domain in our database.
Explore the distribution of 103.7 million domains across Web Filtering and IAB content categories. These charts show the global scale of our classification coverage.
The most comprehensive and accurate domain categorization lookup available, completely free.
Our database covers the vast majority of active domains on the internet, with continuous crawling and re-classification to keep data fresh. Schools use this lookup to verify educational resources before approving them through our web filtering solution for schools and educational institutions.
Machine learning models analyze page content, metadata, link structure, and behavioral signals to assign accurate categories to every domain.
Domains can belong to multiple categories simultaneously. A news site covering technology will show both News and Technology tags.
Categories are continuously updated as websites evolve. Historical categorization changes are tracked for compliance and audit purposes.
Integrate domain lookup directly into your applications with our REST API. Process up to 1,000 lookups per second with sub-50ms response times, or run bulk domain lookups for entire lists in a single request.
Beyond categories, our lookup reveals safety ratings, content risk indicators, and reputation scores to help protect your network and users.
Three simple steps to categorize any domain on the internet.
Type or paste any domain name into the search field. No need to include http:// or www. Just the domain is enough.
Our system queries the database of 100 million pre-classified domains and returns matching categories in under 50 milliseconds.
View detailed category assignments, country of origin, and metadata. Export or integrate results via API.
Organizations across every industry rely on domain categorization data for security, compliance, and content filtering.
Quickly verify domain categories when configuring web filters, troubleshooting access issues, or auditing employee browsing policies.
Educators use domain lookup to check if a site is categorized correctly before requesting whitelist or blacklist changes for student networks.
SOC teams investigate suspicious domains by checking their categorization, reputation scores, and historical classification changes.
Integrate our domain categorization API into your products and workflows. Process thousands of domains per second with enterprise-grade reliability.