Programmer Workshop
Calculate subnets, CIDR ranges, masks and convert between IPv4 and IPv6.
Calculate network, broadcast, mask, hosts and range for an IPv4 CIDR.
Convert between CIDR prefixes and IPv4 netmasks.
Summarize an IPv4 range into CIDR blocks or expand a CIDR into a range.
Split a parent CIDR into VLSM subnets sized for required hosts.
Expand, shorten or convert IPv4 to IPv6-mapped addresses.