PTR record Archives - dnsrecord.eu

Reverse DNS Lookup Explained

Nov 1, 2024 Declan

Tags: PTR, PTR record, rDNS, rDNS Lookup, reverse DNS, Reverse DNS Lookup

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.

An Introduction to PTR Records: What They Are and Why They Matter?

Feb 16, 2023 Declan

Tags: CNAME record, DNS record, domain name, IP address, MX record, Pointer DNS record, Pointer record, PTR DNS record, PTR record, TXT record

Setting up and managing PTR records has become an essential part of establishing and maintaining reliable email communication. Learn more about what PTR records are and why they matter by reading our blog post.

What are PTR Records, and How Do They Work?

PTR records, also known as Pointer DNS records, are pointers that connect an IP address to a domain name. They are used to verify that the IP address belongs to the correct domain name. When you send emails or run a web server, the emails or web requests must have a properly configured PTR to be correctly delivered. The PTR works similarly to a regular DNS lookup, except that instead of finding the domain name from an IP address, it finds the IP address from a domain name. When the server looks up an IP address, it will also look up the corresponding PTR record. This allows the server to verify that the IP address is associated with the correct domain before allowing the request or email to be delivered.