OUI Lookup
b81999
Nesys
Manufacturer Information
- OUI Prefix
- b81999
- Manufacturer
- Nesys
- Address
- Energeticheskaya, 1 Moscow RU 111116
- Last updated
- 6/19/2026
Vendor Statistics
- Total prefixes
- 1
- Block type
- MA-L
- Available addresses
- ~16 millones
About prefix B81999
The OUI prefix B81999 is assigned to Nesys, based in Energeticheskaya, 1 Moscow RU 111116 . 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 Nesys.