The Dominuse (domain in use) website allows you to quickly check in bulk whether a domain is unavailable for registration by checking its IP address.
Bulk Domain Search
Enter a list of domains separated by any non-domain characters to check if they are unavailable for registration. You can also load a list from a file.
Results
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We processed 0 of 0 domains in 0 ms.
0 domains from your list are not in use and 0 domains are in use.
Unused Domains
These 0 domains are not in use, but they may be registered. Use WHOIS to verify.
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Domains In Use
These 0 domains are in use and are definitely not available for registration.
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Unprocessed Domains
An error occurred while processing these 0 domain(s).
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Not Domains
These 0 words don't look like domains.
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