MAC Address Lookup
Find the vendor name of a device by entering an OUI or a MAC address
topsystem GmbH
OUI: E4:12:89
Vendor name: topsystem GmbH
Address:
Assignment Type MA-L Krefelder Straße 201
Aachen 52070
DE.
Mac Address Block Large (previously named OUI). Number of address 2^24 (~16 Million)
Last updated: 11 January 2023
Initial registration: 07 May 2011
