D-Link International

Any device whose MAC address begins with 1C:5F:2B has a network interface built by D-Link International. 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:5F:2B

Organization

D-Link International

Address

1 Internal Business Park, #03-12,The Synergy, Singapore Singapore Singapore SG 609917

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.