70:B3:D5:CF:4 Harbin Cheng Tian Technology Development Co., Ltd.
Every MAC address from 70:B3:D5:CF:40:00 to 70:B3:D5:CF:4F:FF belongs to a block the IEEE assigned to Harbin Cheng Tian Technology Development Co., Ltd.. Network cards, phones and other devices it makes carry addresses from here.
Assignment
Who 70:B3:D5:CF:4 belongs to
Written 70:B3:D5:CF:4, 70-B3-D5-CF-4 or 70B3D5CF4, depending on the system. Look up a full address.
Prefix
70:B3:D5:CF:4/36
Organization
Harbin Cheng Tian Technology Development Co., Ltd.
Registry
MA-S (36 bits)
Addresses
4,096
First address
70:B3:D5:CF:40:00
Last address
70:B3:D5:CF:4F:FF
Address type
Globally unique, unicast
Registered address
ROOM140，Building21A，145 Nantong Street Harbin Heilongjiang CN 150001
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.