All free tools
Networking
Subnet Splitter (VLSM)
Carve a network into equal subnets — enter a base CIDR and the new prefix, and get every subnet's range and host count.
192.168.1.0/26192.168.1.1 – 192.168.1.62 62 hosts192.168.1.64/26192.168.1.65 – 192.168.1.126 62 hosts192.168.1.128/26192.168.1.129 – 192.168.1.190 62 hosts192.168.1.192/26192.168.1.193 – 192.168.1.254 62 hosts
Splits an IPv4 network into equal subnets. “Hosts” is usable addresses — the network and broadcast address are excluded for /30 and larger blocks.