Issue
When using CIDR (Classless Inter Domain Routing) or Supernetting it is not always obvious what range of IP addresses can be used.
Product Line
EcoStruxure Building Operation
Environment
- Device Administrator
- Building Commissioning Tool
Cause
When subnet masks with values other than 255 are used it is not always obvious what is the range of valid IP addresses allowed. There is a need for an easy way to determine the range of valid IP addresses for the Subnet Mask being used.
Resolution
The IP address range can be calculated mathematically but the simplest method is to use a subnet calculator. The website links below are both examples that will calculate the range of valid addresses for any specified subnet value.
http://www.subnet-calculator.com/cidr.php
https://www.calculator.net/ip-subnet-calculator.html
Visit either of the websites for a CIDR / Supernet calculator, enter an IP addresses in the network along with a subnet mask and the calculator will provide the range of addresses that can be used within the subnet.
In addition to online calculators, a number of different subnet-calculator programs are available for Android, Apple and Windows Smartphones.
