Bulk WHOIS Lookup
Check WHOIS information for multiple domains at once. Get registrar details, expiry dates, creation dates, and nameservers. Support for CSV upload and export.
Our free bulk WHOIS lookup tool allows you to check domain registration information for multiple domains simultaneously. Upload a CSV file or paste domains directly. Get detailed WHOIS data including registrar, expiry dates, creation dates, and nameservers. Perfect for domain portfolio management, competitor research, and brand protection.
Features
Bulk Processing
Check up to 20 domains at once. Upload CSV files or paste domain lists for efficient batch processing. Perfect for managing large domain portfolios.
Detailed Information
Get comprehensive WHOIS data including registrar, expiry dates, creation dates, nameservers, and registration status.
Export Options
Download results in CSV format, copy to clipboard, or export as JSON for API integration. Perfect for reporting and analysis.
Smart Filtering
Filter domains by status, expiry date, or registrar. Quickly identify domains needing attention or renewal.
How to Use
Enter domains (one per line) or upload a CSV file
mydomain.net
test-site.org
For CSV uploads, ensure your file has a "domain" column
example.com,Main site
test.com,Development
Click "Start Lookup" to process domains
Free users can check up to 20 domains per request
View results and use filters to analyze data
Filter by status, expiry date, or registrar
Common Use Cases
Domain Management
- Track domain expiration dates
- Monitor registration changes
- Verify domain ownership
- Check nameserver configuration
- Audit domain portfolios
Brand Protection
- Monitor similar domains
- Track cybersquatting
- Identify domain ownership
- Research brand infringement
- Domain acquisition planning
Technical Research
- DNS configuration checks
- Registrar comparison
- Domain history research
- Technical contact info
- Nameserver verification
Understanding WHOIS Data
Key Information
The company managing the domain registration (e.g., GoDaddy, Namecheap)
When the domain was first registered
When the domain registration will expire
DNS servers handling domain resolution
Domain Statuses
Domain is registered and operational
Registration has lapsed
Protected against unauthorized transfers
Domain changes being processed
Best Practices
Domain Management
- Regularly check domain expiration dates
- Enable auto-renewal for critical domains
- Keep domain contact information updated
- Use domain privacy when needed
- Document domain ownership details
Security Tips
- Enable domain locking
- Use strong registrar passwords
- Monitor domain changes
- Verify nameserver settings
- Keep payment info current
Frequently Asked Questions
How many domains can I check at once?
Free users can check up to 20 domains per request. This limit helps ensure fair usage and maintains service quality. For larger batches, consider breaking them into multiple requests or using our API.
What format should my CSV file be in?
Your CSV file should have a column named "domain" containing the domain names. Additional columns will be preserved in the export. Example format:
domain,category,notes example.com,main,Production site test.com,dev,Development server
Is the WHOIS data accurate?
We fetch real-time WHOIS data from authoritative sources. However, some domains may have privacy protection enabled, limiting available information. The data is as accurate as what the registrars provide through their WHOIS servers.
How often should I check my domains?
For critical domains, we recommend monthly checks to ensure registrations are current and details are accurate. Set up a regular schedule to review expiration dates, especially for domains without auto-renewal.