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IPv4 Netmask Length, Net Size and Netmask

netmask
length
net
size
net
mask
net
class
8 16777216 255.0.0.0 A
9 8388608 255.128.0.0
10 4194304 255.192.0.0
11 2097152 255.224.0.0
12 1048576 255.240.0.0
13 524288 255.248.0.0
14 262144 255.252.0.0
15 131072 255.254.0.0
16 65536 255.255.0.0 B
17 32768 255.255.128.0
18 16384 255.255.192.0
19 8192 255.255.224.0
20 4096 255.255.240.0
21 2048 255.255.248.0
22 1024 255.255.252.0
23 512 255.255.254.0
24 256 255.255.255.0 C
25 128 255.255.255.128
26 64 255.255.255.192
27 32 255.255.255.224
28 16 255.255.255.240
29 8 255.255.255.248
30 4 255.255.255.252
31 2 255.255.255.254


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