Subnet Calculator
Calculate IPv4 networks, host ranges, and subnet masks.
Validate IPv4 addresses and identify private ranges.
Your result will appear here.
Enter your input, then run the tool.IPv4 address: 192.168.1.1
Use the labeled units and valid ipv4 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.