This calculator returns a variety of information regarding Internet Protocol version 4 (IPv4) and IPv6 subnets including possible network addresses, usable host ranges, subnet mask, and IP class, …

Feb 12, 2021 · As a developer or network engineer, you may need to occasionally look up subnet mask values and figure out what they mean. To make your life easier, the freeCodeCamp community has …

Jul 23, 2025 · A Subnet Mask is a numerical value that describes a computer or device's how to divide an IP address into two parts: the network portion and the host portion. The network element identifies …

Jan 19, 2025 · What is a Subnet Mask? A subnet mask is a 32-bit number that separates the network and host portions of an IP address. The mask ensures that devices can determine whether an IP …

May 21, 2025 · An IPv4 subnet mask is a 32-bit number that separates the network portion of an IPv4 address from the host portion, helping devices determine if a destination IP address is within the …

Dec 3, 2025 · Subnetting allows a computer/host to know if the machine it wants to talk to is local or outside of its network. The subnet mask determines how many IPv4 addresses can be assigned …

Aug 5, 2025 · Each entry displays the total IP addresses, corresponding subnet mask, and available host bits. Whether you’re designing networks, diagnosing connectivity issues, or optimizing IP …

Free subnet mask cheat sheets for IPv4 and IPv6. Perfect for network admins and IT pros.

IP Subnet Calculator Enter your IPv4 or IPv6 address in the IP calculator fields below. It will quickly find your subnet mask, CIDR, and full IP range with just a single click. It’s fast and highly accurate.

Think of an IP address as a street address and a subnet mask as the line that separates the neighborhood from the house. The mask tells you which bits define the neighborhood (network) and …