Script to find a dead website / domain

Question

I am working on a powershell script to find websites that either do not work on our server or point to another server. I extract all the site names from the file and use it to find only those sites that do not work on our server. I am trying to use the below script, but getting an error.

As always, both help or advice would be greatly appreciated.

$servers = get-content "path_to_the_file"
foreach ($server in $servers) {
$addresses = [System.Net.Dns]::GetHostAddresses($server)
foreach($a in $addresses) {
"{0},{1}" -f $server, $a.IPAddressToString
 }
}     

The following is the error:

Exception calling "GetHostAddresses" with "1" argument(s): "No such host is known" At      
C:\test1.ps1:3 char:50 + $addresses = [System.Net.Dns]::GetHostAddresses <<<< ($server) + 
CategoryInfo : NotSpecified: (:) [], MethodInvocationException + FullyQualifiedErrorId : 
DotNetMethodException

Answer 1

Just block the exception:

try {
    $addresses = [System.Net.Dns]::GetHostAddresses($server);
}
catch {
    $addresses = [IPAddress]'0.0.0.0';
}