Ciena Corporation

Any device whose MAC address begins with 20:80:58 has a network interface built by Ciena Corporation. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

20:80:58

Organization

Ciena Corporation

Address

7035 Ridge Road Hanover MD US 21076

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.