Cardiopulmonary Corp

Any device whose MAC address begins with 3C:1A:57 has a network interface built by Cardiopulmonary Corp. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

3C:1A:57

Organization

Cardiopulmonary Corp

Address

200 Cascade Blvd Milford CT US 06460

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.