User:Onthost/IP Ranges

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Here is a table of all IP address ranges:

           Subnet Mask             # of Addresses                          Subnet Mask             # of Addresses
/1              128.0.0.0               2.1 billion             /17             255.255.128.0           32,766
/2              192.0.0.0               1 billion               /18             255.255.192.0           16,382
/3              224.0.0.0               536 million             /19             255.255.224.0           8,190
/4              240.0.0.0               268 million             /20             255.255.240.0           4,094
/5              248.0.0.0               134 million             /21             255.255.248.0           2,046
/6              252.0.0.0               67 million              /22             255.255.252.0           1,022
/7              254.0.0.0               34 million              /23             255.255.254.0           510
/8              255.0.0.0               17 million (Class A)    /24             255.255.255.0           254 (Class C)
/9              255.128.0.0             8.4 million             /25             255.255.255.128         126
/10             255.192.0.0             4.2 million             /26             255.255.255.192         62
/11             255.224.0.0             2.1 million             /27             255.255.255.224         30
/12             255.240.0.0             1 million               /28             255.255.255.240         14
/13             255.248.0.0             524 thousand            /29             255.255.255.248         6
/14             255.252.0.0             262 thousand            /30             255.255.255.252         2
/15             255.254.0.0             131 thousand            /31             255.255.255.254         RFC 3021
/16             255.255.0.0             65,534 (Class B)        /32             255.255.255.255.        Loopback address