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 1,771,916,995 billion domains and subdomains.
Find out which domains were added or dropped by registrants, with given search criteria.Learn more
Get the most relevant data to be ahead of emerging security threats.Learn more
Ensure the validity and quality of any email address.Learn more
Get data feeds of new registered domains along with their WHOIS data generated in real time.Learn more
Get full contacts data of the given domain.Learn more
Find connections between various domains, individuals and organizations.Learn more
Get a complete daily list of all the registered domains and zone files.Learn more
Find relations like ownership between hostnames and IPs.Learn more
We provide complete and relevant domain WHOIS data which can be customized and easily integrated as per your business needs.Learn more
Enhance your domain research toolkit by our enterprise-grade web-based solution that helps you in searching...Learn more
The most accurate domain availability checker offered on the market.Learn more
Find out the exact physical location of any IP address, email or domain name.Learn more
Find out which IP range the particular IP belongs to.Learn more
Reveal all the domains that use the same mail server.Learn more
Discover subdomains related to the target domain name.Learn more
Get insights for the new business registered on the web.Learn more
Assess the domain's or IP addresses reputation and risk profile with a simple score based on a comprehensive...Learn more
Monitor exact matches, variations and common misspellings of your brand name & trademarks.Learn more
Define website category of the given domain.Learn more
Easily detect all typosquatting domain names as soon as they are registered each day.Learn more
Instantly get a screenshot of any web page.Learn more
Identify who is hosting a particular domain name or website.Learn more
Get well-parsed and normalized WHOIS information for any domain name, IP address or email.Learn more
Find all domains that use the same name server.Learn more
Find domains and subdomains related by specific terms in their hostnames.Learn more
Keep track of the best business opportunities online.Learn more
Get access to the biggest US Internet Retailers Database.Learn more