CenturyLink

Any device whose MAC address begins with A0:09:4C has a network interface built by CenturyLink. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

A0:09:4C

Organization

CenturyLink

Address

100 CenturyLink Drive Monroe US 71203

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.