NETWORKOpen source
CIDR & Subnet Calculator Network, Broadcast, Host Range & Subnet Splitting
Calculate IPv4 and IPv6 subnet ranges, netmasks, wildcard masks, usable host counts and split a block into smaller subnets entirely in your browser.
Network address
Broadcast address
First usable host
Last usable host
Subnet mask
Wildcard mask
Total addresses
Usable hosts
Address range
Scope