Hostname IP Resolution

[shaunm]

Hi All,

I'm not that much familiar with the topic 'IP Name Resolution'

I had this multiple IP addresses pointing to the same Web space issue because of which Google used to have so many pages in its index for the same Website under different IPs. Now, the problem has been solved.

But when I checked today using some free DNStools online, I get two different IPs for my domain and the canonical subdomain.

example.com - is resolving to an IP address nn.nnn.15.20
www.example.com - is resolving to an IP address nn.nnn.14.20

Is that an issue at all?


Thanks for the help!

[phranque]

the IP address is per hostname not per domain so it is possible to have to separate IP addresses for the main domain and subdomain.

[shaunm]

Thanks @phranque

But is it ok for the canonical subdomain(www) to have a different IP than the non-www version?

[lucy24]

But is it ok for the canonical subdomain(www) to have a different IP than the non-www version?

It's unusual, let's say that. Obviously not impossible.

:: idly picturing inheritance case involving two brothers who couldn't agree on handling of father's domain, so they split it into www and non-www halves ::

It's perfectly normal for other types of subdomain to have a completely different IP address. For example you could have blog.example.com hosted on some major blogging platform's servers so you could share their software. (I know one site that does this. It also makes a convenient way to post site-outage information.)

But when you ask "Is it OK" do you mean
"I'm doing it on purpose; will the search engines mind?"
or do you mean
"The search engines are reporting this information; is it normal?"
Have you recently moved servers?

[shaunm]

Thanks @lucy24 :-)

I meant to ask if it's perfectly normal and acceptable as far as the industry and Google is concerned.

I am not much familiar with such kinda of issue and it's handled by an entirely different team. I found this accidentally when I was checking for their resolving IP addresses. I was just wondering if this could have a negative impact on my ranking and traffic. But I don't think this is something new and believe it was just like this for so many years now. Because there wasn't anything like a server move in recent years and it's our own hosting server.