By using the Reverse MX service you can identify spamming, phishing and other poor reputation sites on your host.Get started
100 free requests monthly. No credit card required.
Just take the mail server and do a quick Reverse MX Lookup to reveal all the domains that use the same mail server.
With a single API call, make sure that your website does not share the mail server with any suspicious or blacklisted domains - hosts with a dubious reputation may affect email delivery.
The passive DNS database is a large Historic DNS repository with 2 billion hostnames and hundreds of billions of Historic DNS Lookups. We offer an exhaustive and properly parsed passive DNS database in the format of an MYSQL dump or a CSV file that can be easily processed by your application.
We provide service based on the world’s largest constantly updated database with 1,473,142,430 domains and subdomains, 142,703,533 MX records updated daily.
A fast and easy-to-use API for quick access to the largest database. All the results are duly parsed and normalized to a consistent format such as JSON and XML for easy integration with your business processes.
We work hard to improve our services for you. As part of that, we welcome your feedback, questions and suggestions. Please let us know your thoughts and feelings, and any way in which you think we can improve our product.
For a quick response, please select the request type that best suits your needs. For more info regarding the request types, see the Contact us page.