KRNIC is not an ISP but a National Internet Registry similar to APNIC.

AS Number          : AS9959
AS Name            : KOREASTOCKEXCHANGE-AS

[ Organization Information ]
Name               : KOREA STOCK EXCHANGE
Address            : Korea Exchange, IT Strategy, Seoul Yeongdeungpo-gu Yeouinaru-ro 76
Zip Code           : 07329

Name               : AS Manager
Phone              : +82-51-662-2942
E-Mail             : junjs@krx.co.kr


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