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Random IP generator

Pick random IP addresses from a CIDR block or range, for test data, load tests or sampling. Uses your browser's secure random number generator.

Like 192.0.2.0/24, 198.51.100.10-198.51.100.50 or 2001:db8::/64.

Try:

Picking from 192.0.2.1-192.0.2.254: 254 addresses.

How it works

The generator draws each address from your block or range with equal chance. It uses crypto.getRandomValues, the browser's secure random source, and throws away any draw that falls past the end of the range, so no address is more likely than another.

With "No repeats" on, every address in the list is different, so you can ask for at most as many addresses as the range holds. "Skip network and broadcast" leaves out the first and last address of an IPv4 block of /30 or wider, because devices can't use them.

Use documentation ranges like 192.0.2.0/24 or 2001:db8::/32 for examples and test data that must never reach a real host. To list every address in a block instead, use CIDR to IP list.