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Any device whose MAC address begins with 1C:A2:B1 has a network interface built by ruwido austria gmbh. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

1C:A2:B1

Organization

ruwido austria gmbh

Address

Koestendorferstrasse 8 Neumarkt a.W. Salzburg AT 5202

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.