Provide current and historical ownership information on domains / IPs. Identify all connections between domains, registrants, registrars, and DNS servers.
Look into all current and historical DNS / IP connections between domains and A, MX, NS, and other records. Monitor suspicious changes to DNS records.
Get detailed context on an IP address, including its user’s geolocation, time zone, connected domains, connection type, IP range, ASN, and other network ownership details.
Access our web-based solution to dig into and monitor all domain events of interest.
Get access to a web-based enterprise-grade solution to search and monitor domain registrations and ownership details for branded terms, fuzzy matches, registrants of interest, and more.
Detect and block access to and from dangerous domain names before malicious actors can weaponize them. Contact us today for more information.
Unlock integrated intelligence on Internet properties and their ownership, infrastructure, and other attributes.
Our complete set of domain, IP, and DNS intelligence available via API calls as an annual subscription with predictable pricing.
Offers complete access to WHOIS, IP, DNS, and subdomain data for product enrichment, threat hunting and more.
Enjoy priority data access with our premium API services topped with extra perks including dedicated team support, enterprise-grade infrastructure, and SLAs for full scalability and high performance.
Multi-Level API User Administration Now Available - Manage individual API keys for team members in your organization.
Learn MoreWe offer different ways—Lookup, API, Database—to check which domains are connected by a mail server.
Get started500 free API requests. 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 every week, further adding millions of historical DNS records. The database contains more than half a million MX records for billions of domains and subdomains.
Reverse MX API can be easily integrated into existing systems as it supports various programming languages that include JavaScript (JS), Java, C#, NodeJS, Perl, PHP, PowerShell, Python, and Ruby on Rails (ROR). The passive DNS database can also be downloaded in full as a MySQL dump or comma-separated values (CSV) file.
Avoid mail server blacklisting and the consequent damage that can do to your email deliverability and domain reputation. Use our reverse MX solutions to pinpoint bad hosts that may be connected to spamming or malicious activities.
Expand your list of indicators of compromise (IoCs) and potentially related artifacts. Use our reverse MX tools to uncover connected domains that may otherwise seem unrelated to threats.
Assess how vulnerable specific third parties are to threats and compromise. Use our reverse MX solutions to analyze an organization's mailing functions by gaining insights into its network structure and possible security vulnerabilities.
Collect as much data as possible on threats and possibly their perpetrators. Use our reverse MX tools to do extensive research on potentially malicious mail servers and connected web properties.
We are here to listen. For a quick response, please select your request type. By submitting a request, you agree to our Terms of Service and Privacy Policy.