Subnet / CIDR Calculator
Calculate network ranges, subnet masks, broadcast addresses and usable hosts from any CIDR notation
Subnet Calculator
Enter an IP address with CIDR prefix length to calculate subnet details.
Quick Presets
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Enter an IP address with CIDR prefix (e.g. 10.0.0.0/8)
Tool Features
Complete IPv4 subnet analysis
CIDR Calculation
Calculate network, broadcast, and host ranges from CIDR notation
Subnet Math
Network mask, wildcard mask, first & last usable hosts
IP Classification
Identify IP class, private ranges, and address type
Binary View
See network and mask in binary format