Reverse DNS lookup
Updated: 05/13/2019 by Computer Hope
A reverse DNS lookup may refer to any of the following:
1. Also called reverse resolving and rDNS (domain name system), Reverse DNS lookup is looking up an IP address to resolve a hostname instead of the other way around. This technique is used to help diagnose networking related issues or 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.