Subnet Calculator
Calculate IPv4 networks, host ranges, and subnet masks.
Check IPv6 address syntax, including compressed notation.
Your result will appear here.
Enter your input, then run the tool.IPv6 address: 2001:db8::1
Use the labeled units and valid ipv6 address. The Example button supplies a reproducible starting input.
Calculate IPv4 networks, host ranges, and subnet masks.
Query public PTR records for an IPv4 address.
Inspect local address ranges, binary notation, and historical IP classes.