OUI Lookup
04197f
Grasphere Japan
Manufacturer Information
- OUI Prefix
- 04197f
- Manufacturer
- Grasphere Japan
- Address
- 3-1-11 NNT build. Tokyo JP 1030013
- Last updated
- 6/10/2026
Vendor Statistics
- Total prefixes
- 1
- Block type
- MA-L
- Available addresses
- ~16 millones
About prefix 04197F
The OUI prefix 04197F is assigned to Grasphere Japan, based in 3-1-11 NNT build. Tokyo JP 1030013 . 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 Grasphere Japan.