Reverse DNS, also known as rDNS or reverse name resolution, is a process that translates an IP address into a domain name. It is the opposite of forward DNS, which translates a domain name into an IP address. Reverse DNS is used for a variety of purposes, including:
- Identifying the owner of an IP address
- Verifying the authenticity of an email sender
- Preventing spam and phishing attacks
There are a few different ways to check for reverse DNS. One way is to use a command-line tool such as nslookup or dig. Another way is to use a website such as MXToolbox or DNSstuff.