30:3D:51:4 Dspread Technology (Beijing) Inc.
Every MAC address from 30:3D:51:40:00:00 to 30:3D:51:4F:FF:FF belongs to a block the IEEE assigned to Dspread Technology (Beijing) Inc.. Network cards, phones and other devices it makes carry addresses from here.
Assignment
Who 30:3D:51:4 belongs to
Written 30:3D:51:4, 30-3D-51-4 or 303D514, depending on the system. Look up a full address.
Prefix
30:3D:51:4/28
Organization
Dspread Technology (Beijing) Inc.
Registry
MA-M (28 bits)
Addresses
1,048,576
First address
30:3D:51:40:00:00
Last address
30:3D:51:4F:FF:FF
Address type
Globally unique, unicast
Registered address
Jingxin Building, 2045 Suite , Chaoyang District Beijing CN 100027
Parent block
Inside 30:3D:51
This MA-M block is carved from the 24-bit block 30:3D:51, which the IEEE holds as IEEE Registration Authority and divides among smaller assignees.
Same organization
Other blocks assigned to Dspread Technology (Beijing) Inc.
10 more blocks registered under the same name.