MAC Address Lookup
Find the vendor name of a device by entering an OUI or a MAC address
Riken Keiki Co., Ltd.
MAC prefix: 00:21:BB
Vendor name: Riken Keiki Co., Ltd.
MAC range: 00:21:BB:00:00:00 - 00:21:BB:FF:FF:FF
Block Size: 16777215 (16.77 M)
Itabashi-Ku Tokyo 174-8744
Mac Address Block Large (previously named OUI). Number of address 2^24 (~16 Million)
Initial registration: 25 October 2008
Last updated: 17 November 2015