Subnet Calculator
Calculate IPv4 networks, host ranges, and subnet masks.
Query public PTR records for an IPv4 address.
Your result will appear here.
Enter your input, then run the tool.IPv4 address: 8.8.8.8
This lookup needs an Internet connection. Availability and answers depend on the external lookup provider.
Calculate IPv4 networks, host ranges, and subnet masks.
Check IPv6 address syntax, including compressed notation.
Inspect local address ranges, binary notation, and historical IP classes.