- Prefix
- 00:21:BB 00-21-BB 0021.BB
- Block type
- MA-L (16,777,216 addresses)
- Address range
- 00:21:BB:00:00:00 – 00:21:BB:FF:FF:FF
- Organization
- Riken Keiki Co., Ltd.
- Registered address
- 2-7-6 Azusawa, Itabashi-Ku Tokyo 174-8744, JP
- Country
- Japan (JP)
- Address bits
- Unicast (I/G bit 0), globally unique (U/L bit 0)
Look up 00:21:BB:00:00:00
Riken Keiki Co., Ltd. holds 1 block in total: see all. Source: IEEE Registration Authority public listing.