B4:A2:EB:A Hengkang（Hangzhou）Co.,Ltd
Every MAC address from B4:A2:EB:A0:00:00 to B4:A2:EB:AF:FF:FF belongs to a block the IEEE assigned to Hengkang（Hangzhou）Co.,Ltd. Network cards, phones and other devices it makes carry addresses from here.
Assignment
Who B4:A2:EB:A belongs to
Written B4:A2:EB:A, B4-A2-EB-A or B4A2EBA, depending on the system. Look up a full address.
Prefix
B4:A2:EB:A/28
Organization
Hengkang（Hangzhou）Co.,Ltd
Registry
MA-M (28 bits)
Addresses
1,048,576
First address
B4:A2:EB:A0:00:00
Last address
B4:A2:EB:AF:FF:FF
Address type
Globally unique, unicast
Registered address
Industrial Area,Huanghu Town,Yuhang District Hangzhou Zhejiang CN 311118
Parent block
Inside B4:A2:EB
This MA-M block is carved from the 24-bit block B4:A2:EB, which the IEEE holds as IEEE Registration Authority and divides among smaller assignees.