[{"mac_prefix":"A4:90:05","mask_bits":24,"block_type":"MA-L","organization":"CHINA GREATWALL COMPUTER SHENZHEN CO.,LTD","address":"409,2#,Greatwall Bldg,No.3 Kefa Road,Science \u0026 Industry Park,Nanshan District, Shenzhen Guangdong CN 51807","country":"CN"}]