Private Device Engine
IPv4 Subnet Calculator
Calculate network, subnet mask, broadcast, address count and usable host range from CIDR notation. Includes /31 and /32 handling.
How to use IPv4 Subnet Calculator
Enter the requested address or domain and run the tool. Batch inputs accept one entry per line. Review each result and its status before exporting JSON or CSV.
Validation and calculation happen locally on your device. Zero external data calls.