Calculate CIDR blocks, host ranges, wildcard masks, and broadcast addresses. Export results as CSV.
| # | Network Address | Host Range | Broadcast | Usable IPs |
|---|---|---|---|---|
| 1 | 192.168.1.0 | 192.168.1.1 — 192.168.1.254 | 192.168.1.255 | 254 |
| CIDR | Subnet Mask | Usable Hosts | Use Case |
|---|---|---|---|
| /8 | 255.0.0.0 | 16,777,214 | Enterprise-scale |
| /16 | 255.255.0.0 | 65,534 | Large organisations |
| /24 | 255.255.255.0 | 254 | Small business / dept |
| /25 | 255.255.255.128 | 126 | Segmented teams |
| /26 | 255.255.255.192 | 62 | Small teams |
| /27 | 255.255.255.224 | 30 | Micro-segments |
| /30 | 255.255.255.252 | 2 | Point-to-point |
Input your base network address in standard IPv4 format, then specify the CIDR prefix length (from /8 through /32) or define your requirements by host count per subnet. The calculator immediately processes your input and presents detailed subnet information.
Results include subnet boundaries, available host ranges, broadcast addresses, and total usable IP counts. For project documentation or team sharing, export the complete analysis as a CSV file with a single click.
Professional subnet calculators eliminate manual calculation errors whilst accelerating network planning workflows. They're essential for DevOps teams managing infrastructure as code, cloud architects designing scalable environments, and network engineers planning capacity requirements.
Consider future growth requirements alongside current host needs. Allow for 25-30% expansion capacity in most scenarios. For point-to-point links, /30 subnets provide efficiency, whilst /24 networks offer flexibility for most departmental requirements.
Network addresses identify the subnet itself and cannot be assigned to hosts, whilst broadcast addresses facilitate communication with all devices within the subnet. Both are reserved and reduce the total usable host count by two addresses per subnet.
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