SG NETWORKING TOOL
Subnet and CIDR Calculator
Calculate IPv4 and IPv6 networks, then generate safe private or documentation subnets for labs and testing.
IPv4 subnet calculator
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IPv4 test subnet generator
IPv6 prefix calculator
IPv6 test subnet generator
Testing guidance: Use RFC 1918 IPv4 private ranges, IPv6 ULA space, or documentation-only ranges. Documentation ranges are intended for examples and should not be routed on the public internet.
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