MAC Address Lookup
Find the vendor name of a device by entering an OUI or a MAC address
Beijing Topsec Network Security Technology Co., Ltd.
Vendor name: Beijing Topsec Network Security Technology Co., Ltd.
Haidian District Beijing 100085
Mac Address Block Large (previously named OUI). Number of address 2^24 (~16 Million)
Last updated: 17 November 2015
Initial registration: 23 January 2005