Subnet Calculator
Calculate network, broadcast, host range, and mask details from CIDR
This free online subnet calculator runs in your browser and is part of our Calculators collection.
Subnet Calculator
Calculate network details from an IPv4 address and CIDR prefix.
Included values
- Network, broadcast, first and last usable addresses
- Subnet mask and wildcard mask
- Total and usable host counts
- Binary mask breakdown for study and debugging
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