Advanced Subnet Calculator
Calculate subnets, plan VLSM, split networks, convert IP ranges, and aggregate subnets.
| CIDR | Subnet Mask | Wildcard | Addresses | Usable Hosts | Class |
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Advanced Subnet Calculator Features
This comprehensive subnet calculator provides all the tools network engineers need for IP address planning and management.
Subnet Calculator
Enter any IP address and CIDR notation or subnet mask to instantly calculate network address, broadcast address, host range, wildcard mask, and see a visual binary representation.
VLSM Planner
Variable Length Subnet Masking (VLSM) allows you to divide a network into subnets of different sizes based on actual host requirements. This is more efficient than using equal-sized subnets.
Subnet Splitter
Split any network into smaller subnets by specifying the number of subnets needed, hosts per subnet, or the target CIDR. Useful for planning new network segments.
IP Range to CIDR
Convert a range of IP addresses to CIDR notation. The tool finds the minimum number of CIDR blocks needed to exactly cover the specified range.
Supernet Calculator
Aggregate multiple contiguous networks into a single supernet (route summarization). This reduces routing table size and improves network efficiency.
CIDR Reference Table
Quick reference for all CIDR notations from /0 to /32 showing subnet masks, wildcard masks, and host counts.