We offer different ways—Lookup, API, Database—to check which domains are connected by a mail server.Get started
100 free requests monthly. No credit card required.
Simply type in a mail server address on our functional graphical user interface (GUI) to get a list of all the domain names that share it.
Reverse MX API allows you to see other domains that share the same mail server via API calls. It can be used in conjunction with existing security systems.
Our reverse mail server services glean data from DNS Database Download, one of the most extensive passive Domain Name System (DNS) repositories in the world. As a result of more than 12 years of data crawling, our database has amassed millions of mail server and nameserver records and billions of historical DNS records.
The passive DNS database that provides data for our reverse MX services is updated daily, further adding millions of historical DNS records to its already massive base. The database contains more than 142,703,533 million MX records and information on over 1,4B+ domains and subdomains.
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Find all domains that use the same name server.Learn more
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Easily detect all typosquatting domain names as soon as they are registered each day.Learn more
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Assess the domain's or IP addresses reputation and risk profile with a simple score based on a comprehensive...Learn more
Find domains and subdomains related by specific terms in their hostnames.Learn more
Get data feeds of new registered domains along with their WHOIS data generated in real time.Learn more
We provide complete and relevant domain WHOIS data which can be customized and easily integrated as per your business needs.Learn more
Reveal all the domains that use the same mail server.Learn more
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The most accurate domain availability checker offered on the market.Learn more