E4:81:B3 Shenzhen ACT Industrial Co.,Ltd.
Every MAC address from E4:81:B3:00:00:00 to E4:81:B3:FF:FF:FF belongs to a block the IEEE assigned to Shenzhen ACT Industrial Co.,Ltd.. Network cards, phones and other devices it makes carry addresses from here.
Assignment
Who E4:81:B3 belongs to
Written E4:81:B3, E4-81-B3 or E481B3, depending on the system. Look up a full address.
Prefix
E4:81:B3
Organization
Shenzhen ACT Industrial Co.,Ltd.
Registry
MA-L (a 24-bit OUI)
Addresses
16,777,216
First address
E4:81:B3:00:00:00
Last address
E4:81:B3:FF:FF:FF
Address type
Globally unique, unicast
Registered address
NO.5 B/D,BEISHAN INDUSTRIAL PARK,BEISHAN R/D, Shenzhen Guangdong CN 518083