E4:12:89 topsystem GmbH
Every MAC address from E4:12:89:00:00:00 to E4:12:89:FF:FF:FF belongs to a block the IEEE assigned to topsystem GmbH. Network cards, phones and other devices it makes carry addresses from here.
Assignment
Who E4:12:89 belongs to
Written E4:12:89, E4-12-89 or E41289, depending on the system. Look up a full address.
Prefix
E4:12:89
Organization
topsystem GmbH
Registry
MA-L (a 24-bit OUI)
Addresses
16,777,216
First address
E4:12:89:00:00:00
Last address
E4:12:89:FF:FF:FF
Address type
Globally unique, unicast
Registered address
Krefelder Straße 201 Aachen DE 52070