IP address / prefix
Prefix and subnet mask
/32 – 255.255.255.255
/31 – 255.255.255.254
/30 – 255.255.255.252
/29 – 255.255.255.248
/28 – 255.255.255.240
/27 – 255.255.255.224
/26 – 255.255.255.192
/25 – 255.255.255.128
/24 – 255.255.255.0
/23 – 255.255.254.0
/22 – 255.255.252.0
/21 – 255.255.248.0
/20 – 255.255.240.0
/19 – 255.255.224.0
/18 – 255.255.192.0
/17 – 255.255.128.0
/16 – 255.255.0.0
/15 – 255.254.0.0
/14 – 255.252.0.0
/13 – 255.248.0.0
/12 – 255.240.0.0
/11 – 255.224.0.0
/10 – 255.192.0.0
/9 – 255.128.0.0
/8 – 255.0.0.0
/7 – 254.0.0.0
/6 – 252.0.0.0
/5 – 248.0.0.0
/4 – 240.0.0.0
/3 – 224.0.0.0
/2 – 192.0.0.0
/1 – 128.0.0.0
/0 – 0.0.0.0
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