20:B3:7F:A ShenZhen C&D Electronics CO.Ltd.
Every MAC address from 20:B3:7F:A0:00:00 to 20:B3:7F:AF:FF:FF belongs to a block the IEEE assigned to ShenZhen C&D Electronics CO.Ltd.. Network cards, phones and other devices it makes carry addresses from here.
Assignment
Who 20:B3:7F:A belongs to
Written 20:B3:7F:A, 20-B3-7F-A or 20B37FA, depending on the system. Look up a full address.
Prefix
20:B3:7F:A/28
Organization
ShenZhen C&D Electronics CO.Ltd.
Registry
MA-M (28 bits)
Addresses
1,048,576
First address
20:B3:7F:A0:00:00
Last address
20:B3:7F:AF:FF:FF
Address type
Globally unique, unicast
Registered address
9th FIoor, Building 9, No.1 Qingxiang road, BaoNeng Science and TechnoIogy Industrial Park, Longhua New District ShenZhen GuangDong CN 518000
Parent block
Inside 20:B3:7F
This MA-M block is carved from the 24-bit block 20:B3:7F, which the IEEE holds as IEEE Registration Authority and divides among smaller assignees.
Same organization
Other blocks assigned to ShenZhen C&D Electronics CO.Ltd.
3 more blocks registered under the same name.