Subnet Calculator
Calculate IPv4 networks, host ranges, and subnet masks.
Inspect local address ranges, binary notation, and historical IP classes.
Your result will appear here.
Enter your input, then run the tool.IPv4 or 32-bit binary address: 192.168.1.10
Use the labeled units and valid ipv4 or 32-bit binary 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.
Check IPv6 address syntax, including compressed notation.