[{"mac_prefix":"E8:18:63:20","mask_bits":28,"block_type":"MA-M","organization":"AVCON Information Technology Co.,Ltd","address":"Room 2408, No 2 Building, 335# Guoding Road Shanghai Shanghai CN 200433","country":"CN"},{"mac_prefix":"FC:E4:98:90","mask_bits":28,"block_type":"MA-M","organization":"AVCON Information Technology Co.,Ltd.","address":"Building A6, Wangu Science and Technology Park, 1688 Guoquan North Road, Yangpu District Shanghai Shanghai CN 021-55666588","country":"CN"}]