Reverse DNS Lookup (rDNS) comes in when you want to find a domain name from an IP address. So, let’s explain a little bit more about it, how it works, and why it matters. Without any further ado, let’s begin!

What is Reverse DNS Lookup?

A Reverse DNS Lookup (rDNS) is a process of identifying a domain name associated with an IP address. Unlike a standard DNS query, which translates a domain name into an IP address, rDNS does the opposite. It’s helpful in many scenarios, especially for verifying server identities, improving email deliverability, and enhancing security.

For example, if you have an IP address and you want to know which domain name it corresponds to, an rDNS lookup can provide this information. It’s frequently used by administrators, network engineers, and cybersecurity professionals to verify where traffic is coming from or to troubleshoot issues related to connectivity.

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