IPv4 subnet planner
Subnify.
Plan IPv4 subnets from a network and host counts. Inspect address ranges, copy results, or export a PDF.
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A small office network
Each requirement gets the smallest block that fits, including network and broadcast addresses. Larger requirements allocate first.
10.30.0.0/23224 of 512 addresses free
| Subnet | Network | Required / usable hosts |
|---|---|---|
| Staff | 10.30.0.0/25 | 120 / 126 |
| Guest | 10.30.0.128/26 | 60 / 62 |
| Voice | 10.30.0.192/26 | 40 / 62 |
| IoT | 10.30.1.0/27 | 30 / 30 |
The planner includes the full usable range, subnet mask, and broadcast address for every subnet.