And here is how:

$iprange = 200..254
Foreach ($ip in $iprange)
{
    $computer = "192.168.37.$ip"
    $status = Test-Connection $computer -count 1 -Quiet
    if (!$status)
    {
        $computer + " - available" 
    }
}

Copy the code over to PowerShell ISE console, change the IP info and hit the green Go button. You will get the result within a minute.

I personally really like this block of code because I can run many other things between each IP loop to gather more information about each computer on the network, such as uptime, hard drive usage, etc. But if you prefer a one-liner that gives you a set of simple result, try this.

200..254 | foreach { $status=Test-Connection "192.168.37.$_" -Count 1 -Quiet; "192.168.37.$_ $status"}

Hope it helps.