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Private IPv4 address spaces

02/03/2012
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      In the Internet addressing architecture, a private network is a network that uses private IP address space, which is not directly connected to public network. The standards are set by RFC 1918 and RFC 4193. These spaces are usually used for local area networks (LANs) of home, office, and enterprise.
      
      space:
      10.0.0.0 – 10.255.255.255 is 24-bit block , there is 16,777,216 in a single class A, the large CIDR block is : 10.0.0.0/8 (255.0.0.0)
      
      172.16.0.0 – 172.31.255.255 is 20-bit block , there are 1,048,576 addresses in 16 contiguous class Bs , the large CIDR block is : 172.16.0.0/12 (255.240.0.0)
      
      192.168.0.0 – 192.168.255.255 is 16-bit block , there are 65,536 addresses in 256 contiguous class Cs , the large CIDR block is : 192.168.0.0/16 (255.255.0.0)

[02/03/2012, 06:10]

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