Subnet masks are used to divide IP addresses into subnetworks for efficient data routing and network management.

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 · To figure out the CIDR notation for a given subnet mask, all you need to do is convert the subnet mask into binary, then count the number of ones or "on" digits.

CIDR /27: 30 usable IPs, mask 255.255.255.224. Calculate AWS VPC, Azure VNET & GCP subnets. Small network with dozens to hundreds of IP addresses.

Jul 23, 2025 · This cheat sheet provides a handy reference for understanding and calculating subnet masks, ensuring efficient network management and troubleshooting. By using this resource, you can …

Sep 5, 2024 · As a full-stack developer and network engineer, you may need to occasionally look up subnet mask values and figure out what they mean. To make your life easier as a developer, I have …

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 …

A subnet mask is also 32 bits, with contiguous 1s for the network part and 0s for the host part. The dotted decimal form is just that bit pattern grouped by octet. For example, 255.255.255.0 is 24 …

Quick reference crib sheet for daily subnetting tasks. You can use the IPv4 and IPv6 charts for IP address planning and to convert subnet masks to CIDR and wildcards.

Mar 18, 2025 · In CIDR notation, the subnet mask is represented as a forward slash followed by the number of bits set to 1 in the mask.