Simple Subnet Network Tool
Free subnet calculator for IPv4 and IPv6. Get the network address, broadcast, mask, wildcard and usable host range instantly. CIDR cheat sheet included.
Simple Subnet Network Tool launched on March 13, 2016 with 26 votes, #1,870 of 4,409 launches that month and more than 75% of that year's launches. The site was still online in September 2026, 10 years on.
In plain words
Simple Subnet Network Tool is a free calculator for IPv4 and IPv6 subnetting that provides network addresses, broadcast addresses, masks, wildcards, and usable host ranges. It includes a CIDR cheat sheet for quick reference. The tool is designed for network administrators and IT professionals who need to quickly calculate subnet information without manual computation.
written from the facts on this page · September 2026
From the sources
RFC 1918 private space, the usual choice for home and office LANs. Not announced in BGP, so there is no operator or routing tofrom subnet.im
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