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Free, fast IT tools with no account required.

Networking

Subnet CalculatorCalculate network, broadcast, host range and mask from an IP and CIDR prefix.VLSM CalculatorSplit a base network into variable-size subnets based on how many hosts each one needs.

Development

Base ConverterConvert numbers between binary, octal, decimal, and hexadecimal in real time.

Sysadmin

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Security

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