Question

I’m looking to isolate the first three octets of an IPv4 address

$IPAddress = Get-WmiObject Win32_NetworkAdapterConfiguration |
Where { $_.IPAddress } |
Select -Expand IPAddress |
where { $_ -like '*.*' } | % {
$_.SubString($_.IndexOf(""))
}

Write-host IP Address is $IPAddress

My output is currently

IP Address is 192.168.10.78

Could someone put me out of my misery and tell me what I need to do with the SubString / IndexOf in order to knock off everything after and including the final . so it reads

IP Address is 192.168.10

I’m sorry, but I’m a complete newbie, and it’s taken me 2 hours to write/steal these 6 lines

Answer 1

This is without using substring

( Get-WmiObject Win32_NetworkAdapterConfiguration | Where { $_.IPAddress } | 
Select -Expand IPAddress  ) | % { $_.split('.')[0..2] -join '.' }

this using substring:

( Get-WmiObject Win32_NetworkAdapterConfiguration | Where { $_.IPAddress } | 
Select -Expand IPAddress  ) | % {$_.substring(0, $_.LastIndexOf('.')) }