B4:4D:43:3 ETSME Technologies C0., Ltd.
Every MAC address from B4:4D:43:30:00:00 to B4:4D:43:3F:FF:FF belongs to a block the IEEE assigned to ETSME Technologies C0., Ltd.. Network cards, phones and other devices it makes carry addresses from here.
Assignment
Who B4:4D:43:3 belongs to
Written B4:4D:43:3, B4-4D-43-3 or B44D433, depending on the system. Look up a full address.
Prefix
B4:4D:43:3/28
Organization
ETSME Technologies C0., Ltd.
Registry
MA-M (28 bits)
Addresses
1,048,576
First address
B4:4D:43:30:00:00
Last address
B4:4D:43:3F:FF:FF
Address type
Globally unique, unicast
Registered address
17/F,Building A,No1190,BinAn Road,Binjiang District Hangzhou Zhejiang CN 310056
Parent block
Inside B4:4D:43
This MA-M block is carved from the 24-bit block B4:4D:43, which the IEEE holds as IEEE Registration Authority and divides among smaller assignees.