Address Ranges

[stevelibby]

I have various web site domains which all feature the same subject. I bought a reseller account a couple years back to make my life easier and cheaper, and since last year i noticed a sharp decrease in popularity accross all sites. I have read further that there could be issues with web sites that are on the same ip address that also link into each other.
Is this something that G looks into now and that this could be a reason for the fall? Can anyone give me greater knowledge on this issue.

[jonrichd]

Steve:

Google got a patent [webmasterworld.com] a few years back on some ways of telling if two websites are related or not. One of the methods listed in the patent was to compare the first 3 numbers in a dot notation IP address to see if they were the same (e.g. 192.168.1.10 and 192.168.1.30 have the same class C IP range, while 192.168.1.10 and 10.1.10.56 do not). They came up with other methods as well, for example looking at subdomains. Another way would be to look at WHOIS data to check for the same ownership.

IMHO, simply having two sites with similar content in the same IP range (or even on the same IP address) would probably be a small factor in a site's overall rankings.

However, if you had two sites that linked to each other, had the same IP range, and the same domain registration information, that might raise some red flags.

I'm guessing that your reseller account lets you run a report of account names and IP addresses assigned. You might consider looking at that to see how close your sites are to each other in terms of IP addresses.

[stevelibby]

Hi They are all on the same C Class. I have asked serveice provider, but they say all hosted are on that IP and that i cant change it.

[MrSpeed]

I have seen the same thing with my sites. I think some of my problems were due to duplicate content fron using datafeeds and newsfeeds.

Fine.

However I do have some quality sites and it also seems like Google is discounting links from the same IP.

I used to have site that ranked quite well and has many backlinks from free hosting companies like geocities and tripod.

Discounting links from the same IP is about the only reason for the decline I can come up with.