tado GmbH

Any device whose MAC address begins with EC:E5:12 has a network interface built by tado GmbH. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

EC:E5:12

Organization

tado GmbH

Address

Lindwurmstr. 76 Munich Bavaria DE 80337

Source

IEEE OUI registry

Have a full MAC address? Look it up— we'll also tell you if it's a randomized (private) address rather than a real manufacturer prefix.