Subnet Calculator
Enter any valid IPv4 address
Enter a value from 1 to 32 (e.g., /24)
Enter a subnet mask in dotted decimal notation
What Is Subnetting & Why Does It Matter?
Subnetting is the process of dividing an IP network into smaller logical networks called subnets. It allows network administrators to organize IP addresses efficiently, improve security by isolating network segments, and maximize the use of available IP addresses. This subnet calculator helps you understand network boundaries, host ranges, and subnet masks — essential knowledge for network planning and administration.
Who Uses This Tool?
- Network Administrators: Planning office networks, data centers, and corporate infrastructure
- Cloud Engineers: Configuring VPCs (Virtual Private Clouds) in AWS, Azure, or Google Cloud
- IT Support Teams: Troubleshooting connectivity issues and understanding network structure
- Security Professionals: Designing network segmentation and firewall rules
- Students & Trainees: Learning networking fundamentals and preparing for certifications (CompTIA, Cisco)
Learn More About IP Networks
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