SISTEMAS AUDIOVISUALES ITELSIS S.L.

Any device whose MAC address begins with A4:E9:91 has a network interface built by SISTEMAS AUDIOVISUALES ITELSIS S.L.. 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:E9:91

Organization

SISTEMAS AUDIOVISUALES ITELSIS S.L.

Address

POL.IND. DEL TAMBRE SANTIAGO COMPOSTELA A CORUÑA ES 15890

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.