Products APIs Data Feeds Web Tools Domain Research & Monitoring Enterprise Packages
WHOIS / WHOIS History
WHOIS / WHOIS History

Provide current and historical ownership information on domains / IPs. Identify all connections between domains, registrants, registrars, and DNS servers.

DNS / DNS History
DNS / DNS History

Look into all current and historical DNS / IP connections between domains and A, MX, NS, and other records. Monitor suspicious changes to DNS records.

IP Geolocation / IP Netblocks
IP Geolocation / IP Netblocks

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.

Domain Research Suite (DRS)
Domain Research Suite (DRS)

Access our web-based solution to dig into and monitor all domain events of interest.

Domain Research Suite (DRS)
Domain Research Suite (DRS)

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.

Research
Monitoring
White-Label
Enterprise API Packages
Enterprise API Packages

Our complete set of domain, IP, and DNS intelligence available via API calls as an annual subscription with predictable pricing.

Security Intelligence (SI) Suite
Security Intelligence (SI) Suite

Offers complete access to WHOIS, IP, DNS, and subdomain data for product enrichment, threat hunting and more.

Premium API Services
Premium API Services

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.

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FAQs

What is Reverse IP/DNS API?

Reverse IP/DNS API is a domain and IP intelligence solution that is easily integrable into existing systems and applications. It lets you obtain a comprehensive list of all the domains that resolve to a particular IP address. Results can be viewed in either JavaScript Object Notation (JSON) or eXtensible Markup Language (XML) format, whichever works best.

Is there a Reverse IP/DNS API request limit?

If you use the product free of charge, you can only make 100 requests. You can, however, choose to get more credits (1 credit = 1 query) for a one-time fee, depending on how many queries you need to make. Or if you run reverse IP/DNS queries constantly for work, you can opt for a monthly or an annual subscription. Check out this page for more pricing information.

What can you use Reverse IP/DNS API for?

Reverse IP/DNS API can be used for cybersecurity. So if your security solution flags a malicious IP address, Reverse IP/DNS API will tell you the domains connected to it.

Apart from enhancing cybersecurity, reverse IP/DNS API also helps with website administration, marketing and sales, and brand protection. For more information and illustrative examples on using Reverse IP/DNS API, access this product-specific blog.

Does Reverse IP/DNS API come in a different format?

The data you get from Reverse IP/DNS API is also obtainable via:

  • DNS Database Download, which you can also integrate into existing security systems and applications within your own environment.
  • Reverse IP/DNS Lookup, a web-based service that works the same way as the API with the addition of providing a customized URL that points to a report for any given IP address.

What is the idea behind Reverse IP/DNS API?

Reverse IP/DNS API is connected to a massive passive Domain Name System (DNS) database that contains data on 2+ billion hostnames and hundreds of billions of DNS-related events. That lets users know all the domains that resolved to a particular IP address over time. If any of the said domains are malicious, companies that employ IP-level blocking may include a connected IP address in their blacklists.

Where can I find technical information on Reverse IP/DNS API?

Check out our Reverse IP/DNS API Docs page for technical information, including:

  • How to make requests
  • What output formats are available
  • How to check your account balance
  • What error codes mean

How can I get customer support?

If you have additional questions, you may reach out to any of our team members by dropping us an email at:

  • for technical and account support
  • for product customization and feature requests
  • for pricing and partnership inquiries

Various support tiers, including Premium Support, which gives you access to our call center support team members, are also available.

I want to learn more about how the DNS works. Do you have a good resource?

Yes, take a look at our Domain Name System Primer for more information on the key DNS concepts.