[{"mac_prefix":"00:1F:09","mask_bits":24,"block_type":"MA-L","organization":"Jastec","address":"Jastec B/D 2F, 92-7 Kumgok-dong,  Boondang-gu,  KR 463-804","country":"KR"},{"mac_prefix":"4C:8F:A5","mask_bits":24,"block_type":"MA-L","organization":"Jastec","address":"Jastec B/D 2F, 92-7 Kumgok-dong,  Boondang-gu,  KR 463-804","country":"KR"}]