Resolve IP Addresses from List of Host Names

If you have a list of hostnames/servers that you need IP addresses for its cumbersome to ping each server and get the ip address.

PowerShell to the rescue!

To do this we need a file called Server.txt with each server’s hostname on each line. I am storing the file in D:\Data\Servers.txt.

Once we run the script below it resolves the ip via DNS and stores to another file called D:\Data\Addresses.txt.

All the IP addresses are getting pulled from their DNS value.Â

function Get-HostToIP($hostname) {     
    $result = [system.Net.Dns]::GetHostByName($hostname)     
    $result.AddressList | ForEach-Object {$_.IPAddressToString } 
} 
 
Get-Content "D:\Data\Servers.txt" | ForEach-Object {(Get-HostToIP($_)) >> d:\data\Addresses.txt}

function Get-HostToIP($hostname) {

$result = [system.Net.Dns]::GetHostByName($hostname)

$result.AddressList | ForEach-Object {$_.IPAddressToString }

}

Get-Content "D:\Data\Servers.txt" | ForEach-Object {(Get-HostToIP($_)) >> d:\data\Addresses.txt}