by Mark IP Subnet Calculator IPv4 Subnet Calculator Subnet Mask: 255.255.255.255 /32 255.255.255.254 /31 255.255.255.252 /30 255.255.255.248 /29 255.255.255.240 /28 255.255.255.224 /27 255.255.255.192 /26 255.255.255.128 /25 255.255.255.0 /24 255.255.254.0 /23 255.255.252.0 /22 255.255.248.0 /21 255.255.240.0 /20 255.255.224.0 /19 255.255.192.0 /18 255.255.128.0 /17 255.255.0.0 /16 255.254.0.0 /15 255.252.0.0 /14 255.248.0.0 /13 255.240.0.0 /12 255.224.0.0 /11 255.192.0.0 /10 255.128.0.0 /9 255.0.0.0 /8 IP Address: Calculate IPv6 Subnet Calculator Prefix Length: /128 /64 /56 /48 /32 IP Address: Calculate