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

  1. Also called reverse resolving and rDNS, Reverse DNS lookup is 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 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.

  1. A reverse lookup is also a method of locating an address from a phone number.
  • How to test if a website or web page is down.
  • Network and network card help and support.

DNS, Nameserver, Network terms

  • Sites offering phone number reverse lookups.