70:B3:D5:21:0 Eastone Century Technology Co.,Ltd.
Every MAC address from 70:B3:D5:21:00:00 to 70:B3:D5:21:0F:FF belongs to a block the IEEE assigned to Eastone Century Technology Co.,Ltd.. Network cards, phones and other devices it makes carry addresses from here.
Assignment
Who 70:B3:D5:21:0 belongs to
Written 70:B3:D5:21:0, 70-B3-D5-21-0 or 70B3D5210, depending on the system. Look up a full address.
Prefix
70:B3:D5:21:0/36
Organization
Eastone Century Technology Co.,Ltd.
Registry
MA-S (36 bits)
Addresses
4,096
First address
70:B3:D5:21:00:00
Last address
70:B3:D5:21:0F:FF
Address type
Globally unique, unicast
Registered address
A12 Floor, Information Port, 16 Keyun Road, Tianhe DistrictGuangzhou Guangzhou GuangDong CN 510000
Parent block
Inside 70:B3:D5
This MA-S block is carved from the 24-bit block 70:B3:D5, which the IEEE holds as IEEE Registration Authority and divides among smaller assignees.