Enter up to 40 Domains (Each Domain must be on separate line)
Use this free tool to check Class C IP address of a list of websites. Knowing Class C IP Address is a big factor in Link building. Google penalizes websites that cross link to each other from within the same class C ip address. These links are often filtered out of the ranking algorithms.
Duplicate Class C IP address in a list of websites means, these can be either hosted affiliate and internet marketing sites or potential reciprocal link exchange partners. Avoid cross-link from any domains that you own or any domains that share the same Class C Block of IPs.
To reach a specific website, you need a domain name. And every domain name has at least one IP address associated with it. An IP address is a string of decimal numbers, each pair separated by a full stop (dot). An IP consist of 4 parts.
For example look at the IP address: 188.8.131.52 Consider this like AAA.BBB.CCC.xxx - the first part (123) is called A-class, the second part (145) B-class and the third part (196) C-class.
Many smaller host only mange one single or very few C-classes. So if you host all your sites the same place, it is difficult to get different C-classes.
Simply enter your list of domain names (up to 20 domains) in the large text box and begin your test.