Essential for network administrators and students. Design your network architecture with precision by calculating host ranges and wildcard masks instantly.
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Professional Subnet Calculator
Calculate network range, subnet mask, and broadcast address for any IPv4 CIDR block. Fast, free, and 100% private. All processing happens locally.
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About Professional Subnet Calculator
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1
IP Address
Enter your starting IP (e.g., 192.168.1.0).
2
Prefix
Select your subnet mask or CIDR prefix.
3
Analyze
Review the full network breakdown and host count.
Key Features
CIDR Support
Works with all prefix lengths (/0 to /32).
Host Ranges
See first and last usable IP addresses.
Binary View
Visualizes the network and host portions in binary.
Frequently Asked Questions
Classless Inter-Domain Routing (CIDR) is a method for allocating IP addresses and IP routing that replaces the old Class A, B, and C system.
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