Use VLSM Calculator online for practical networking tasks. Fast, free, and runs directly in your browser.
| No. | Subnet | Required | Capacity | Network | Prefix | Mask | First IP | Last IP | Broadcast | Total | Unused hosts |
|---|
Host requirements are sorted from largest to smallest. The minimum block size is the nearest power of two that can hold hosts + 2 addresses for network and broadcast. The prefix is calculated with 32 − log₂(block size).
Example: 192.168.10.0/24 with 100, 50, 20, and 10 hosts produces /25, /26, /27, and /28 blocks without overlap.
VLSM Calculator is a free browser-based utility for networking tasks. Enter your data, review the result, and use the available copy or download options where supported.
Processing is performed directly in your browser whenever the tool supports local processing.
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