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 MoreCheck which domains link back to a mail server via API calls to avoid hosts with a dubious reputation, improve email delivery, and other purposes.
Get started500 free API credits. No credit card required.
A reverse MX API is a way to check if several domains can be found on a specified mail server through API calls. This information can help verify if a mail server is dedicated or shared across multiple hosts for cybersecurity and marketing ends.
We provide results pulled from our large and constantly updated DNS database with millions MX records updated weekly for billions of domains and subdomains.
Reverse MX API is a fast and easy-to-use API for quick access to domains with a shared mail server. All the results are duly parsed and normalized to a consistent format such as JSON and XML for easy integration into your business processes.
Prevent your mail server from being blacklisted and avoid harm to your email deliverability. Use Reverse MX API to identify bad hosts that may be involved in spamming, phishing, and other malicious activities.
Our passive DNS repository contains billions of historical DNS records for billions of domains and subdomains. Access to our passive DNS database can help you find all there is to know about any Internet property and its DNS records.
Request a QuoteOur APIs are available in an enhanced version that offers better performance with a dedicated load balancer and a premium endpoint to enable faster throttling for large-scale API deployments.
Learn moreReverse MX API is available together with reverse NS, IP, and other domain intelligence APIs as part of an annual enterprise subscription with predictable pricing.
Learn moreGet free access to our API. 500 free credits. No credit card required.
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