[{"mac_prefix":"00:50:C2:E5:60","mask_bits":36,"block_type":"IAB","organization":"RFENGINE CO., LTD.","address":"2/809, ITCASTLE, 550-1 GASAN-DONG SEOUL  KR 153-768","country":"KR"},{"mac_prefix":"8C:1F:64:2F:A0","mask_bits":36,"block_type":"MA-S","organization":"RFENGINE CO., LTD.","address":"1-618 Cheongju Techno S-Tower, 530 Jikji-Daero, Heungdeok-Gu Cheongju-Si  KR 28578","country":"KR"},{"mac_prefix":"8C:1F:64:60:A0","mask_bits":36,"block_type":"MA-S","organization":"RFENGINE CO., LTD.","address":"#1-618 CHEONGJU TECHNO S-TOWER CHEONGJU-SI  KR 28578","country":"KR"}]