Landis+Gyr S.A.

Any device whose MAC address begins with 98:B1:77 has a network interface built by Landis+Gyr S.A.. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

98:B1:77

Organization

Landis+Gyr S.A.

Address

78th km Old National Road Athens-Corinth Corinth GR 20100

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.