I had reason to iterate over all the web sites that we host to determine which domains we host the DNS for. I did some Googling and found a PowerShell script that I heavily modified to come up with the following:

$name = "heat-assault.com"

try{
    $dns = Resolve-DnsName -Name $name -Type NS -DnsOnly -ErrorAction Stop

    $IPhash = @{}

    $dnsHostName = ($dns | Where-Object Section -ne Additional | Select-Object -first 1).NameHost

    if ($dnsHostName -like '*canadawebhosting*')
        {
            Write-Host "CWH"
        } else {
            Write "Nope - " $dnsHostName 
        }

} Catch{
    [pscustomobject]@{
        Name = $name
        NameHost = ''
        IP = ''
        Status = $Error[0].Exception.Message
    }
}