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プライベートIP範囲(CIDR)ホスト数早見表

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プライベートIP範囲をCIDRで表記したときのホスト数の早見表です。

IP範囲(CIDR) 最初のホスト 最後のホスト ホスト数 ネットワーク部
192.168.0.0/16 192.168.0.1 192.168.255.254 65,534 11000000.10101000.
192.168.0.0/17 192.168.0.1 192.168.127.254 32,766 11000000.10101000.0
192.168.0.0/18 192.168.0.1 192.168.63.254 16,382 11000000.10101000.00
192.168.0.0/19 192.168.0.1 192.168.31.254 8,190 11000000.10101000.000
192.168.0.0/20 192.168.0.1 192.168.15.254 4,094 11000000.10101000.0000
192.168.0.0/21 192.168.0.1 192.168.7.254 2,046 11000000.10101000.00000
192.168.0.0/22 192.168.0.1 192.168.3.254 1,022 11000000.10101000.000000
192.168.0.0/23 192.168.0.1 192.168.1.254 510 11000000.10101000.0000000
192.168.0.0/24 192.168.0.1 192.168.0.254 254 11000000.10101000.00000000.
192.168.0.0/25 192.168.0.1 192.168.0.126 126 11000000.10101000.00000000.0
192.168.0.0/26 192.168.0.1 192.168.0.62 62 11000000.10101000.00000000.00
192.168.0.0/27 192.168.0.1 192.168.0.30 30 11000000.10101000.00000000.000
192.168.0.0/28 192.168.0.1 192.168.0.14 14 11000000.10101000.00000000.0000
192.168.0.0/29 192.168.0.1 192.168.0.6 6 11000000.10101000.00000000.00000
192.168.0.0/30 192.168.0.1 192.168.0.2 2 11000000.10101000.00000000.000000
192.168.0.0/31 - - 0 11000000.10101000.00000000.0000000
192.168.0.0/32 - - 0 11000000.10101000.00000000.00000000
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