JSC SDO Chromatec

Any device whose MAC address begins with A4:B3:6A has a network interface built by JSC SDO Chromatec. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

A4:B3:6A

Organization

JSC SDO Chromatec

Address

94, Stroiteley street Yoshkar-Ola Mari El republic RU 424000

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.