Couldn't resolve host 'opendart.fss.or.kr'

Array
(
    [url] => https://opendart.fss.or.kr/api/list.json?crtfc_key=8a98b543b4f027a0fb28a3b8c0c655780503220e&corp_code=286750&bgn_de=19990101&page_no=1
    [content_type] => 
    [http_code] => 0
    [header_size] => 0
    [request_size] => 0
    [filetime] => -1
    [ssl_verify_result] => 0
    [redirect_count] => 0
    [total_time] => 0
    [namelookup_time] => 0
    [connect_time] => 0
    [pretransfer_time] => 0
    [size_upload] => 0
    [size_download] => 0
    [speed_download] => 0
    [speed_upload] => 0
    [download_content_length] => -1
    [upload_content_length] => -1
    [starttransfer_time] => 0
    [redirect_time] => 0
    [redirect_url] => 
    [primary_ip] => 
    [certinfo] => Array
        (
        )

)

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No	Company Name	Document	Presenter	Date	ETC