Network Tools

Plan subnets, verify address ranges, and inspect masks with deterministic browser-side calculations instead of a remote IP database.

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Calculate CIDR ranges, masks, and host capacity.

Summarize an IPv4 range with minimal CIDR blocks.

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Calculate network, broadcast, masks, usable range, and capacity from an address and prefix.

Cover an inclusive start and end with the smallest aligned CIDR set and no extra addresses.

Local-first

Address math happens on your device. The TabPebble application does not look up IPv4 values, add them to site requests, or persist them.

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