$host   = 'whois.ripe.net';
        $port   = 43;
        $out    = '89.188.113.172'; 
        $resp   = '';
                   
        if (!$sock = fsockopen($host, $port, $errno, $errstr)) {
            $resp = "$errno($errstr)";           
        } else {
            fputs($sock, "{$out}\r\n");           
            while (!feof($sock)) {
                $resp .= fgets($sock, 128);
            }            
            fclose($sock);
        }
        
        var_dump($resp);