Subnet Calculator is a simple, fast, flat-design utility. No accounts, no clutter — just the tool you need.
**Features**
• Enter IP + CIDR prefix (/0 to /32)
• Network, broadcast and netmask
• First/last usable host + host count
• Wildcard mask included
**Zero everything**
• No login or account needed
• No location, camera, contacts or storage permissions
• Clean Material 3 flat design
• Works fully offline
IPv4 subnet calculator: network, broadcast, mask, host range and count.