Gibt es einen Webservice oder eine Datenbank im Web für alle Top-Level Domains?

function get-tld {
  <#
  .SYNOPSIS
    Query IANA ROOT-TLD Whois Server
  .DESCRIPTION
    Check if a TLD exists. If YES the function returns TRUE otherwise FALSE. On Error it returns "ERROR"  
  .EXAMPLE
    get-tld -query "de"  
  .PARAMETER query
    The TLD to search
  #>
    param(
        [parameter(mandatory=$true)][ValidateNotNullOrEmpty()][string]$query
    )
    end{
        Try {
            $query = $query.Trim()
            $client = new-object System.Net.Sockets.TcpClient "whois.iana.org",43  
            $stream = $client.GetStream()
            $data = [System.Text.Encoding]::Ascii.GetBytes($query + "`r`n")  
            $stream.Write($data,0,$data.Length)
            $reader = New-Object System.IO.StreamReader $stream, [System.Text.Encoding]::ASCII
            $response = $reader.ReadToEnd()
            if ($response -match 'This Query returned (\d+) objects?'){  
                if ([int]$matches[1] -gt 0 ){
                    $response
                    $result = $true
                }else{
                    Write-host "Die TLD '$query' existiert nicht!" -ForegroundColor Yellow  
                    $result = $false
                }
            }else{
                $response
                $result = "ERROR"  
            }
        }
        catch [System.Exception] {
            write-host $_ -ForegroundColor Red
            $result = "ERROR"  
        }
        finally{
            $stream.Close()
            $stream.Dispose()
            $client.Close()
            $client.Dispose()
        }
        return $result
    }
}

get-tld "de"