Bulk WHOIS Lookup
Check WHOIS data for multiple domains at once. Paste up to 20 domains and get registration details, expiry dates, and nameservers in bulk.
“One domain at a time is research. A hundred at a time is intelligence. Bulk WHOIS does the latter.”
Written by Ishan Karunaratne · Last reviewed:
What is Bulk WHOIS Lookup?
Bulk WHOIS lookup lets you check WHOIS registration data for multiple domains in a single query. Instead of looking up domains one at a time, you can paste an entire list and get structured results for all of them at once.
I built this tool for scenarios where checking domains individually is too slow. Whether you are managing a domain portfolio, doing due diligence on a batch of domains, analyzing competitor properties, or planning a domain migration, bulk lookup saves significant time.
What Are the Use Cases for Bulk WHOIS?
Portfolio Management
Check registration status, expiry dates, and registrar for all your domains at once. Identify domains that need renewal or are about to expire.
Due Diligence
Before acquiring domains, verify their registration history, age, and current status in bulk. Older domains with clean histories are generally more valuable.
Competitor Analysis
Look up WHOIS data for competitor domains to understand their infrastructure, registrar choices, and domain age patterns.
Migration Planning
When migrating domains between registrars or DNS providers, check the current state of all domains to identify any transfer locks or pending operations.
What Other Tools Help With WHOIS Lookups?
For single domain lookups, use the WHOIS Lookup tool which provides a more detailed view including raw RDAP data. Check domain registration timelines with the Domain Age Checker, or monitor upcoming expirations with the Domain Expiry Checker. To find domains by registrar or nameserver provider, try the Reverse WHOIS search.
Need this in code?
Every check this tool runs is also available via the bulk WHOIS API with examples in cURL, JavaScript, Python, PHP, Ruby, and Java.
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