OUI Lookup
0021bf
Hitachi High-Tech Control Systems Corporation
Manufacturer Information
- OUI Prefix
- 0021bf
- Manufacturer
- Hitachi High-Tech Control Systems Corporation
- Address
- 500,Miyu-cho Mito-shi Ibaraki-ken JP 319-0316
- Last updated
- 6/8/2026
Vendor Statistics
- Total prefixes
- 1
- Block type
- MA-L
- Available addresses
- ~16 millones
About prefix 0021BF
The OUI prefix 0021BF is assigned to Hitachi High-Tech Control Systems Corporation, based in 500,Miyu-cho Mito-shi Ibaraki-ken JP 319-0316 . It is a MA-L type block of 24 bits (first three octets). Allows up to 16 million unique MAC addresses. If you find this prefix on your network, the devices belong to Hitachi High-Tech Control Systems Corporation.