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Old 10-20-2008, 06:19 PM  
IhostSEO
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Join Date: Nov 2007
Posts: 86
Quote:
Originally Posted by kandah View Post
Can someone explain c-classes to me I never picked up on it.

What are classes of IP?

All IPv4 IPs which we use generally consists of 32 bits which is represented with 4 decimal numbers separated by dots(.) for easiness in reading writing and remembering.

For example :
10.11.12.13 is an IP which represents 00001010.00001011.00001100.00001101 in binary

The 4 separate decimals are 4 classes of the IP as per classless convention..

So, for IP 10.11.12.13...

10 = A Class
11 = B Class
12 = C Class
13 = D Class


Now about C Class IPs..

In terms of SEO(SEO hosting more specifically) C Class IPs implies Different C Class IPs, more clearly IPs on different C Classes.

For example IPs 1.1.1.1 and 1.1.1.2 are same C Class as 1.1.1 is common in both.

But IPs 1.1.1.2 and 1.1.2.2 are on different C Class as they are on different c classes 1.1.1 and 1.1.2 respectively.

Similarly 1.1.1.1 and 1.2.2.2 are on different B Classes.
1.1.1.1 and 2.1.1.1 are on different A Classes.



How it is important for SEO?

Yes, it is most important and we realize this. You can go for some Multiple C Class IP hosting providers like me. They let you host your sites on different c class IPs.

I found a blog at V7N regarding Google's Patent which explains why it is important.. blog.v7n.com/2007/10/02/seo-and-web-hosting/


How do I find out if my sites share the same Class C IP?

There are some SEO Tools which let you check C Classes of your sites.
I googled class c checker and found webrankinfo.com/english/tools/class-c-checker.php
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