PowerShell-Subnet

A PowerShell module for cmdlets related to network subnet calculations.

Installation

The module is published in the PSGallery, so if you have PowerShell 5 can be installed by running:

Install-Module Subnet -Scope CurrentUser

Usage

Get the subnet details for a specified network address and mask using slash notation:

Get-Subnet 192.168.4.56/24

Result:

IPAddress        : 192.168.4.56
MaskBits         : 24
NetworkAddress   : 192.168.4.0
BroadcastAddress : 192.168.4.255
SubnetMask       : 255.255.255.0
NetworkClass     : C
Range            : 192.168.4.0 ~ 192.168.4.255
HostAddresses    : {192.168.4.1, 192.168.4.2, 192.168.4.3, 192.168.4.4...}
HostAddressCount : 254

Get the subnet details for a specified network address and mask, as specified via the -MaskBits parameter:

Get-Subnet -IP 192.168.4.56 -MaskBits 20

Result:

IPAddress        : 192.168.4.56
MaskBits         : 20
NetworkAddress   : 192.168.0.0
BroadcastAddress : 192.168.15.255
SubnetMask       : 255.255.240.0
NetworkClass     : C
Range            : 192.168.0.0 ~ 192.168.15.255
HostAddresses    : {192.168.0.1, 192.168.0.2, 192.168.0.3, 192.168.0.4...}
HostAddressCount : 4094

Get the subnet details for the current local network IP:

Get-Subnet

Other Features

• If the subnet size specified is larger than a /16, the cmdlet will not return the host addresses by default, and instead warn that this would take some time. If you want to force the return of host addresses for these subnets, use -Force.
• If no subnet mask size is specified, the cmdlet will use the default size for the class of address, and show a warning that it has done so.