Subnet Ninja

Subnet Ninja is a fast subnet planning tool for network engineers, cloud operators, IT students, and builders who need reliable CIDR math without opening a spreadsheet. Use the free IPv4 calculator to inspect network address, broadcast address, usable host range, subnet mask, wildcard mask, host count, and private/public classification. Paste a CIDR block to fill the address and prefix instantly. Subnet Ninja Pro unlocks the deeper planning workflow: - IPv6 prefix calculations - VLSM planning - CIDR overlap detection - Visual subnet tree generation - AWS, Azure, and GCP network modes - CSV and JSON export - Expanded history and workflow tools A lifetime Pro purchase unlocks Pro features on Apple platforms. Use Restore Purchases on another device signed in with the same Apple account.