Smartlabs

Any device whose MAC address begins with E4:27:71 has a network interface built by Smartlabs. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

E4:27:71

Organization

Smartlabs

Address

72, Oktyabrskaya Street Moscow RU 127521

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.