Reverse DNS lookup

Updated: 05/07/2017 by Computer Hope

A reverse DNS lookup may refer to any of the following:

1. Alternatively referred to as reverse resolving and rDNS, Reverse DNS lookup is the process of looking up an IP address to resolve a hostname instead of the other way around. This technique is often used to help diagnose networking related issues or to determine where network data is going.

Users running Microsoft Windows could use the nslookup command to perform a reverse lookup on an IP address and Linux users can use the host command on nslookup.

2. A reverse lookup is also a method of locating an address from a phone number.

DNS, Nameserver, Network terms