IP addresses hold a very important place in the world of SEO and Internet Marketing. It’s a major factor that decides the fate of the ranking of any websites on the top Search Engine results pages (SERPs). Before preparing the SEO strategy of any website, any SEO consultant should also consider the IP address. IP addresses also play a major role in the backlink strategy of websites.
Before discussing Class C IP and its importance in SEO field, let me first describe IP address in brief.
What is an IP Address?
Every machine or computer on the Internet has a unique identifying number which is known as an IP Address. A typical IP address looks like this:
IP addresses are normally expressed in decimal format as a dotted decimal number (like the one shown above). This is done to make it easier for us (humans) to understand and remember the address. But computers communicate in binary format (0 and 1). Thus the same IP address in binary format would look like:
- 11011000.00011011.00111101.10001001
The four numbers in an IP address are called octets, because they each have eight positions when viewed in binary form. If you add all the positions together, you get 32, which is why IP addresses are considered 32-bit numbers. Since each of the eight positions can have two different states (1 or 0) the total number of possible combinations per octet is 28 or 256. So each octet can contain any value between 0 and 255. Combine the four octets and you get 232 or a possible 4,294,967,296 unique values!
Classes:
Five classes of IP ranges are available: Class A, Class B, Class C, Class D and Class E. Each class allows for a range of valid IP addresses. All IP addresses are broken down into 4 sets of octets that break down into binary to represent the actual IP address.
The octets are used to create classes of IP addresses. The octets are split into two sections: Net and Host. The Net section always contains the first octet. It is used to identify the network that a computer belongs to. Host (sometimes referred to as Node) identifies the actual computer on the network. The Host section always contains the last octet. There are five IP classes plus certain special addresses:
- Class A - IP addresses with a first octet from 1 to 126 are part of class A. The other three octets are used to identify each host.
- Class B - IP addresses with a first octet from 128 to 191 are part of this class B addresses. Class B addresses also include the second octet as part of the Net identifier.
- Class C - Class C addresses are commonly used for small to mid-size businesses. IP addresses with a first octet from 192 to 223 are part of this class. Class C addresses also include the second and third octets as part of the Net identifier. The last octet is used to identify each host.
- Class D – Class D IP is used for multicasts and has a first bit value of 1, second bit value of 1, third bit value of 1 and fourth bit value of 0. The other 28 bits are used to identify the group of computers the multicast message is intended for.
- Class E - Class E is used for experimental purposes only.
Below is a listing of these addresses:Class Address Range SupportsClass A 1.0.0.1 to 126.255.255.254 Supports 16 million hosts on each of 127 networks.
Class B 128.1.0.1 to 191.255.255.254 Supports 65,000 hosts on each of 16,000 networks.
Class C 192.0.1.1 to 223.255.254.254 Supports 254 hosts on each of 2 million networks.
Class D 224.0.0.0 to 239.255.255.255 Reserved for multicast groups.
Class E 240.0.0.0 to 254.255.255.254 Reserved.
Importance of Class C IP in SEO?To increase the backlink of websites, in the era of spam, many webmasters started creating multiple website on same server, linking each other thus trying to improve the ranking of the websites on the SRPs.
Search Engines identified this issue and started avoiding links coming from similar IPs. As it is very easy to get different D class IPs on same server, Search Engines also started avoiding Links from same C Class IP. So when Search Engine find that you’ve a link coming from same C Class IP on which your website is located, the backlink will not have any importance.
So for a successful backlinking strategy, it is always advisable to get links from websites on different C class IP. If you source more than one link from same C class IP, you will get benefit of only one link. Please note that you will not get penalized if you’ve link coming from same C class IP, but you’ll not get any advantage either.
So if you are doing the link exchange specially if you don’t have your own server, do check if the person you are linking to has a different C class IP than yours.