IPv4 Subnet Calculator
Calculate network, subnet mask, broadcast, address count and usable host range from CIDR notation. Includes /31 and /32 handling.
Runs on your device · no data upload
How to use IPv4 Subnet Calculator
Enter the requested address or domain and run the tool. Batch inputs accept one entry per line or comma-separated entries. Review each result and its status before exporting JSON or CSV.
Validation and calculation happen locally. Domain parsing does not check registration, availability or ownership.
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