How to do a reverse DNS lookup?

That is pretty much the question. I have the nnn.nnn.nnn.nnn form of the address. How do I find the www.whatever.com?

Also if I know the www.whatever.com, how do I get the nnn.nnn.nnn.nnn form.

Well, you can go to http://www.arin.net/whois/index.html and plug in the IP address and find out who owns that block of IPs. Trouble is, if the website at the address is hosted by someone else (like my employer), you’ll only get the hoster’s info.

You can find a lot of this sort of this from http://www.samspade.org. You can even download their software.

If you are on an NT or Unix system, and can run NSLOOKUP, it’s easy. There are undoubtedly web gateways to NSLOOKUP, too.

In NSLOOKUP, feeding the program the http://www.name.com will return vvv.www.xxx.yyy.

But if you have the numbers, you would use this neat trick: feed NSLOOKUP: yyy.xxx.www.vvv.IN-ADDR.arpa

And if there is an A record associated with the number, it will return it.

  • Rick

The link to do what you want to do is right here, dude.

http://www.networksolutions.com/cgi-bin/whois/whois

Type in http://www.whatever.com and it’ll show you the IP. Type in the IP, and it’ll show you the domain.

Lots o’ tools for this at DNS Lookup.

If you’re running Windows and all you want to do is get the IP address from the domain name and vice versa, you can do that with the MS-DOS prompt. Open it and type "ping " followed by the address or name. "tracert " also works, and traces the route used to that address.

There are lots of web pages that will also get you that information and more. One I like is http://network-tools.com/ . There’s plenty of other good stuff there, too, especially the Boardwatch articles.

There’s also shareware to do this. I use NeoTrace, which performs a tracert function with additional graphics. If the location of a node is known, it is plotted on a map.

Dr, as they say you just need s program that can do a WHOIS, like PingPro, probably plenty of stuff at download.com for MAc or PC, whatever computer you have, as you didn’t say which.

Test your links before you post.

HorseloverFat – are you being sarcastic?

That was an example of a domain.

Since he asked 13 years ago, he probably knows how to do it (or doesn’t care) by now.