Subnet Calculator
Calculate IPv4 networks, host ranges, and subnet masks.
Normalize MAC addresses into common formats.
Your result will appear here.
Enter your input, then run the tool.MAC address: aabbccddeeff
Use the labeled units and valid mac 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.