Enter an IP Address, Domain Name or IP Address

Blacklist Checker scans over 100+ blacklists in real-time for free.

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Designed for developers

Immediately check and monitor blacklists via our API

With our blacklist checker API you can easily monitor all of your emails and IP to know when you land on a blacklist. Our API is built to be easy to use and return responses fast.

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Get started with 50 free requests per month

Our Blacklist Checker API tests any IP Address, Email Address or Domain Name across 100+ email blacklists. Blacklists can also be called names like realtime blacklist, DNSBL, or RBL. If your mail server has been blacklisted it’s likely that some of your emails will not delivered.

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