B8:38:EF ADVA Optical Networking Ltd.
Every MAC address from B8:38:EF:00:00:00 to B8:38:EF:FF:FF:FF belongs to a block the IEEE assigned to ADVA Optical Networking Ltd.. Network cards, phones and other devices it makes carry addresses from here.
Assignment
Who B8:38:EF belongs to
Written B8:38:EF, B8-38-EF or B838EF, depending on the system. Look up a full address.
Prefix
B8:38:EF
Organization
ADVA Optical Networking Ltd.
Registry
MA-L (a 24-bit OUI)
Addresses
16,777,216
First address
B8:38:EF:00:00:00
Last address
B8:38:EF:FF:FF:FF
Address type
Globally unique, unicast
Registered address
ADVAntage House York GB YO30 4RY