IEEE PES PSRC/SUB

Any device whose MAC address begins with 1C:12:9D has a network interface built by IEEE PES PSRC/SUB. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

1C:12:9D

Organization

IEEE PES PSRC/SUB

Address

Working Group H7/Sub C7 (IEEE PC37.238) Piscataway NJ US 08854

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.