IP換算表

計算するのが嫌になった時に・・・。

IPアドレス数 \ \ サブネットマスク \ \ ビットマスク

1 \ \ 255.255.255.255 \ \ 32
2 \ \ 255.255.255.254 \ \ 31
4 \ \ 255.255.255.252 \ \ 30
8 \ \ 255.255.255.248 \ \ 29
16 \ \ 255.255.255.240 \ \ 28
32 \ \ 255.255.255.224 \ \ 27
64 \ \ 255.255.255.192 \ \ 26
128 \ \ 255.255.255.128 \ \ 25

256 \ \ 255.255.255.0 \ \ 24
512 \ \ 255.255.254.0 \ \ 23
1,024 \ \ 255.255.252.0 \ \ 22
2,048 \ \ 255.255.248.0 \ \ 21
4,096 \ \ 255.255.240.0 \ \ 20
8,192 \ \ 255.255.224.0 \ \ 19
16,384 \ \ 255.255.192.0 \ \ 18
32,768 \ \ 255.255.128.0 \ \ 17
65,536 \ \ 255.255.0.0 \ \ 16
131,072 \ \ 255.254.0.0 \ \ 15
262,144 \ \ 255.252.0.0 \ \ 14
524,288 \ \ 255.248.0.0 \ \ 13
1,048,576 \ \ 255.240.0.0 \ \ 12
2,097,152 \ \ 255.224.0.0 \ \ 11
4,194,304 \ \ 255.192.0.0 \ \ 10
8,388,608 \ \ 255.128.0.0 \ \ 9
16,777,216 \ \ 255.0.0.0 \ \ 8
33,554,432 \ \ 254.0.0.0 \ \ 7
67,108,864 \ \ 252.0.0.0 \ \ 6
134,217,728 \ \ 248.0.0.0 \ \ 5
268,435,456 \ \ 240.0.0.0 \ \ 4
536,870,912 \ \ 224.0.0.0 \ \ 3
1,073,741,824 \ \ 192.0.0.0 \ \ 2
2,147,483,648 \ \ 128.0.0.0 \ \ 1
4,294,967,296 \ \ 0.0.0.0 \ \ 0