Shanghai iComhome Co.,Ltd.

Any device whose MAC address begins with E4:F3:E3 has a network interface built by Shanghai iComhome Co.,Ltd.. 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:F3:E3

Organization

Shanghai iComhome Co.,Ltd.

Address

Small second floor of No.773 Siping Road Shanghai CN 200092

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.