28:DB:81 Shanghai Guao Electronic Technology Co., Ltd
Every MAC address from 28:DB:81:00:00:00 to 28:DB:81:FF:FF:FF belongs to a block the IEEE assigned to Shanghai Guao Electronic Technology Co., Ltd. Network cards, phones and other devices it makes carry addresses from here.
Assignment
Who 28:DB:81 belongs to
Written 28:DB:81, 28-DB-81 or 28DB81, depending on the system. Look up a full address.
Prefix
28:DB:81
Organization
Shanghai Guao Electronic Technology Co., Ltd
Registry
MA-L (a 24-bit OUI)
Addresses
16,777,216
First address
28:DB:81:00:00:00
Last address
28:DB:81:FF:FF:FF
Address type
Globally unique, unicast
Registered address
No.6, Alley 1225 TongPu Road, Shanghai CN 200333