AddySec Subnetter

live beta

A subnetting and addressing engineering tool. Enter an IPv4 address and mask to get the network address, broadcast address, usable host range, host count, and CIDR/VLSM breakdown — instantly, without doing the binary math by hand.

Launch AddySec Subnetter ↗

What it does

• VLSM planner — allocate multiple subnets from one block automatically
• Binary breakdown of the IP and mask, not just the final numbers
• Network address, broadcast address, and usable host range in one pass
• Built for day-to-day networking and network security tasks