HD Communications Corp

Any device whose MAC address begins with 00:1F:51 has a network interface built by HD Communications 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

00:1F:51

Organization

HD Communications Corp

Address

2180 Fifth Ave Ronkonkoma NY US 11779

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.