TELCO systems, s.r.o.

Any device whose MAC address begins with 54:7F:A8 has a network interface built by TELCO systems, s.r.o.. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

54:7F:A8

Organization

TELCO systems, s.r.o.

Address

Zvolenska cesta 20 Banska Bystrica Slovak republic SK 974 05

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.