Using Reverse Lookup
Reverse DNS lookup is a way to track a website or website owner. You can run reverse DNS if you have someone spamming you through email, for example. You simply capture the IP address of the person sending the spam and then run a DNS reverse lookup until you find the right person. Many times this reverse DNS query will give you valuable information found in the registry tables of the major Internet registrars. Whois is the site that maintains the most accurate listing of all websites. You can use a Whois reverse DNS look up to find out the name of the site owner and possibly his or her address. A Whois reverse DNS look up also will tell you the name of the hosting company, which can be valuable for turning in the spammer or hacker and having the person diverted.
A Reverse DNS Failure
A reverse DNS look up does not always go as planned, however, so do not get your hopes up until you know that you may find something. A reverse DNS search may yield reverse DNS errors, for example. These errors could range from a very simple problem. Sometimes with the DNS reverse lookup not working, you may feel you have reached a dead end but you are only trying to perform the lookup when the server is too busy. If you try again in a few minutes, you will be able to get an answer. Another reason for a reverse DNS lookup failure is that the person paid to have a private registration. These people will pay the extra to remain anonymous, but you should still be able to find their hosting company and try to report the problem that way.
Cpanel and Other Problems
Some other problems with a DNS reverse exist. For instance, if you get a 451 bad DNS reverse error, that means that you are trying to connect with a web server but you do not have the right capability. Read the error carefully and try to correct the problem. In addition to these basics, you could run into other issues with DNS lookups. For example, something throwing a RDNS or reverse DNS associates problem will redirect you to an explanation page. You also may encounter a Cpanel reverse DNS. You should look into each of these situations as they arise so that you can work to fix them. Remember that DNS issues can get complex, so take your time and be patient.