Calculate IPv4 subnet details including network address, broadcast address, usable host range, wildcard mask, and binary subnet mask from any IP address and CIDR prefix length.
Subnet
Divide a network into fixed-size equal subnets using Fixed Length Subnet Masking (FLSM). Specify the number of subnets or hosts per subnet to generate complete subnet allocation with free IP blocks.
Fixed Length Subnet Masking (FLSM)
Fixed Length Subnetting
| Subnet Name | Network | First Usable IP | Last Usable IP | Broadcast | Total Usable Host | Total Available Host | Netmask | Wildcard |
|---|
Free/Unused IP Network
| Subnet Name | Network | First Usable IP | Last Usable IP | Broadcast | Total Usable Host | Total Available Host | Netmask | Wildcard |
|---|
Automatically determine the maximum number of equal subnets for a given host count. Partition your network into subnets where each subnet supports the same number of usable hosts.
Equal Host Subnetting
Equal Host Subnetting
| Subnet Name | Network | First Usable IP | Last Usable IP | Broadcast | Total Usable Host | Total Available Host | Netmask | Wildcard |
|---|
Optimize IP address utilization with Variable Length Subnet Masking (VLSM). Enter comma-separated host requirements to create subnets of different sizes and minimize wasted address space.
Variable Length Subnet Masking (VLSM)
Variable Length Subnetting
| Subnet Name | Network | First Usable IP | Last Usable IP | Broadcast | Total Usable Host | Total Available Host | Netmask | Wildcard |
|---|
Free/Unused IP Network
| Subnet Name | Network | First Usable IP | Last Usable IP | Broadcast | Total Usable Host | Total Available Host | Netmask | Wildcard |
|---|
Summarize multiple contiguous IPv4 networks into a single supernet route. Also known as route aggregation, CIDR summarization, or route optimization for efficient routing table management.
Supernetting (IP Route Summarization)
192.168.2.0/24
192.168.3.0/24
192.168.4.0/24
Route Summarization Results
🎯 Summary Network Details
| Summary Network | First Usable IP | Last Usable IP | Broadcast | Total Usable Host | Total Available Host | Netmask | Wildcard |
|---|
📋 Individual Networks
| Network | First Usable IP | Last Usable IP | Broadcast | Total Usable Host | Total Available Host | Netmask | Wildcard |
|---|
Calculate IPv6 subnet details including network prefix, host identifier (Interface ID), full and compressed address formats, address range, scope, and number of /64 subnets from any IPv6 address.