Subnet Calculator vs Network Audit
One plans address space and CIDR structure; the other diagnoses what a live network is doing right now.
Subnet Calculator is for planning
Use the subnet calculator when the hard question is address allocation, host counts, CIDR ranges, or VLSM structure before anything goes live.
Network Audit is for observation
Network Audit becomes more useful when the issue is real-world behavior: speed, leaks, DNS behavior, or connection quality. That is a diagnostic surface, not a planning one.
Design first, diagnose later
A lot of network work uses both pages at different stages. Subnetting helps define the plan; auditing helps inspect what the actual environment is doing once it exists.
Open the tools
Subnet Calculator — Calculate IPv4 and IPv6 subnets, CIDR ranges, usable hosts, and VLSM allocations. Handy for network planning, certification prep, and quick IP math.
Network Audit — Test your network speed and run privacy diagnostics. Check DNS leaks, WebRTC leaks, and connection security.