Cyan Optic, Inc.

Any device whose MAC address begins with 00:1D:99 has a network interface built by Cyan Optic, Inc.. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

00:1D:99

Organization

Cyan Optic, Inc.

Address

1390 N. McDowell Blvd Petaluma CA US 94954

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.