MAC Address Lookup
Find the vendor name of a device by entering an OUI or a MAC address
Shanghai SYH Technology CO.,LTD
MAC address prefix B4:EF:30 is registered to Shanghai SYH Technology CO.,LTD, located at Building 4No. 686 Nanfeng RoadFengcheng TownFengxian DistrictShanghai 201400CN.
This registration is classified as MA-L (Mac Address Block Large) containing approximately 16 million MAC addresses
The prefix was registered on 28 April 2025, and no subsequent updates have been recorded.
OUI: B4:EF:30
Vendor name: Shanghai SYH Technology CO.,LTD
Address:
Assignment Type MA-L Building 4
No. 686 Nanfeng Road
Fengcheng Town
Fengxian District
Shanghai 201400
CN.
Mac Address Block Large (previously named OUI). Number of address 2^24 (~16 Million)
Initial registration: 28 April 2025
