Find all ip addresses for a website

irishdude11

I need to find all ip addresses for a certain website. Can this be done?

Spear

It's a bit of a vague question. You'll need to explain in detail what you're trying to do.

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Or, if you mean common A/CNAME Records you could use something like www.dnscheck.ie

irishdude11

Spear wrote: »

It's a bit of a vague question. You'll need to explain in detail what you're trying to do.

Well, generally 'big' websites can be accessed by many different ip addresses.
Looking at this page, http://www.hcidata.info/host2ip.cgi, boards.ie can be accessed by these ips for example -
89.234.66.107
89.234.66.108

But that page isnt giving all ips for websites, it might give more than one but it is not giving them all. So Im wondering is it possible find all ips for certain websites.

{^Syntax^}

Looks like it is possible based on that site you posted - Unfortunately I'm not familiar with the commands used or processes involved to extract that information! Let us know if you find out though.

The only other way I can think of is to, for example, ping www.boards.ie, copy and paste the IP Address into www.ripe.net and it'll give you a list of IP Addresses owned.

Below you can see boards.ie own a /28 public subnet.

inetnum: 89.234.66.96 - 89.234.66.111
netname: BOARDS-IE
rev-srv: ns05.digiweb.ie
descr: boards.ie
country: IE

MajorMax

I find www.ip-lookup.net very useful

Spear

irishdude11 wrote: »

So Im wondering is it possible find all ips for certain websites.

All of them, no. Any large site will commonly use load balancers or NAT behind a router. You'll see the public IP, but that doesn't guarantee it's the web server IP. You're also at the whim of the DNS server if you're querying that, since it could be geo or load balanced also.

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Plus, some large companies use caching services such as Akamai.