Most widely used IP-addresses

Johannes Beus
There are regularly discussions whether one domain on an IP-address can have negative repercussions for another domains on the same IP-address if it does not play by the rules. For a long time now, I am an advocate of the position that Google is unable to make the IP-address a negative factor in their algorithm because of the large number of shared-hosting-installations that host a large number of domains/hostnames on the same IP-address. Back in 2006 and 2007 I already looked at this and now that I once again have fresh data, I made a top-list with the most widely used IP-addresses, which I want to share:

IP-addresses that host the most domains
#IP-addressOperatorDomains
180.150.6.143T-Online Hosting82.157
274.125.43.121Blogger.com81.686
381.169.145.70Strato60.050
481.169.145.68Strato59.563
581.169.145.75Strato59.541
681.169.145.72Strato59.472
781.169.145.67Strato59.320
881.169.145.73Strato59.281
981.169.145.65Strato59.159
1081.169.145.74Strato59.125
1181.169.145.71Strato59.124
1281.169.145.69Strato58.753
1381.169.145.66Strato58.718
1464.202.189.170GoDaddy.com56.957
15208.73.210.28Oversee.net53.577
16216.8.179.23NameDrive47.947
17205.178.145.65Network Solutions44.028
18188.40.70.45de.vu und Vergleichbares35.647
1968.178.232.99GoDaddy.com27.676
2068.178.232.100GoDaddy.com26.133
2189.31.143.1United Domains21.816
22207.217.125.50EarthLink20.087
2364.95.64.198NameMedia17.729
2485.237.85.69Powerweb17.254
25216.240.187.175Domainsponsor17.129
26209.157.71.50Homestead16.587
27216.240.187.145Domainsponsor16.158
2864.29.151.221Carrierzone.com15.849
29213.186.33.2OVH15.079
3089.31.143.101United Domains15.068
31213.186.33.19OVH14.535
3281.91.170.22Denic14.286
3362.116.163.221InterNetX GmbH13.929
3482.98.86.163Sedo13.578
3568.142.205.137Yahoo13.094
3689.31.143.12United Domains11.622
3782.98.86.171Sedo11.516
38216.39.57.104Yahoo11.426
39216.34.131.135fabulous.com11.179
4081.169.145.87Strato11.130
41216.39.57.107Yahoo11.067
4281.169.145.82Strato10.963
4381.169.145.85Strato10.793
4481.169.145.88Strato10.792
4589.31.143.2United Domains10.773
4681.169.145.83Strato10.767
4781.169.145.84Strato10.751
4881.169.145.81Strato10.727
4981.169.145.91Strato10.718
5081.169.145.86Strato10.671

Funnily, Google's Blogger.com is already on position two thanks to all the blogs that are hosted there, beaten only by T-Online. Next up are GoDaddy and then Strato's mass-servers. These are a great example, since Google can not simply punish each of the 55.000 domains on a server if only a few of those domains do not play by the rules. This is not to say that they will never do a manual examination of these IP-addresses – but even then, I believe that Google has better factors that they use.
Johannes Beus - on Tue (06/22/2010) at 14:38 PM

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