[{"mac_prefix":"C4:A1:0E:00","mask_bits":28,"block_type":"MA-M","organization":"HYOSUNG Heavy Industries Corporation","address":"119, Mapo-daero (Gongdeok-dong), Mapo-gu Seoul  KR 04144","country":"KR"},{"mac_prefix":"70:B3:D5:41:A0","mask_bits":36,"block_type":"MA-S","organization":"HYOSUNG Heavy Industries Corporation","address":"119, Mapo-daero, Mapo-gu Seoul  KR 04144","country":"KR"},{"mac_prefix":"8C:1F:64:C0:70","mask_bits":36,"block_type":"MA-S","organization":"HYOSUNG Heavy Industries Corporation","address":"119, Mapo-daero, Mapo-gu Seoul  KR 04144","country":"KR"}]