B4:EF:30 Shanghai SYH Technology CO.,LTD
Every MAC address from B4:EF:30:00:00:00 to B4:EF:30:FF:FF:FF belongs to a block the IEEE assigned to Shanghai SYH Technology CO.,LTD. Network cards, phones and other devices it makes carry addresses from here.
Assignment
Who B4:EF:30 belongs to
Written B4:EF:30, B4-EF-30 or B4EF30, depending on the system. Look up a full address.
Prefix
B4:EF:30
Organization
Shanghai SYH Technology CO.,LTD
Registry
MA-L (a 24-bit OUI)
Addresses
16,777,216
First address
B4:EF:30:00:00:00
Last address
B4:EF:30:FF:FF:FF
Address type
Globally unique, unicast
Registered address
Building 4, No. 686 Nanfeng Road, Fengcheng Town, Fengxian District Shanghai CN 201400