OUI Lookup
b838ef
ADVA Optical Networking Ltd.
Manufacturer Information
- OUI Prefix
- b838ef
- Manufacturer
- ADVA Optical Networking Ltd.
- Address
- ADVAntage House York GB YO30 4RY
- Last updated
- 6/8/2026
Vendor Statistics
- Total prefixes
- 7
- Block type
- MA-L
- Available addresses
- ~16 millones
About prefix B838EF
The OUI prefix B838EF is assigned to ADVA Optical Networking Ltd., based in ADVAntage House York GB YO30 4RY . 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 ADVA Optical Networking Ltd..