What Is Subnet Masks Table?
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Subnet masks are a way to identify which part of an IP address is the network portion and which part is the host portion. The table below shows the most common subnet masks and the number of networks and hosts each can accommodate.
Subnet Mask Number of Networks Number of Hosts
255.0.0.0 1 16,777,214
255.128.0.0 2 8,388,606
255.192.0.0 4 4,194,302
255.224.0.0 8 2,097,150
255.240.0.0 16 1,048,574
255.248.0.0 32 524,286
255.252.0.0 64 262,142
255.254.0.0 128 131,070
255.255.0.0 256 65,534
255.255.128.0 512 32,766
255.255.192.0 1,024 16,382
255.255.224.0 2,048 8,190
255.255.240.0 4,096 4,094
255.255.248.0 8,192 2,046
255.255.252.0 16,384 1,022
255.255.254.0 32,768 510
255.255.255.0 65,536 254
255.255.255.128 131,072 126
255.255.255.192 262,144 62
255.255.255.224 524,288 30
255.255.255.240 1,048,576 14
255.255.255.248 2,097,152 6
255.255.255.252 4,194,304 2
A subnet mask table is a list of predetermined subnet masks that are used to identify available subnets and associated networks. It contains information about the maximum number of hosts in each subnet, its broadcast address, valid IP addresses, and other related information. Network administrators use the table to quickly determine the best subnet mask to use in any given scenario.