[{"mac_prefix":"00:1C:06","mask_bits":24,"block_type":"MA-L","organization":"Siemens Numerical Control Ltd., Nanjing","address":"No. 18 Siemens Road, Jiangning Development Zone Nanjing JiangSu CN 211100","country":"CN"},{"mac_prefix":"E8:EF:22","mask_bits":24,"block_type":"MA-L","organization":"Siemens Numerical Control Ltd., Nanjing","address":"18 Runhuai Road, Lishui Zone Nanjing  CN 211200","country":"CN"}]