Vendor name: Riken Keiki Co., Ltd.

MAC Prefix: 00:21:BB

MAC Range: 00:21:BB:00:00:00 - 00:21:BB:FF:FF:FF

Type: MA-L

Address: 2-7-6 Azusawa
　　　　　Itabashi-Ku Tokyo 174-8744
　　　　　 JP