Hangzhou H3C Technologies Co., Limited

Any device whose MAC address begins with 5C:DD:70 has a network interface built by Hangzhou H3C Technologies Co., Limited. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

5C:DD:70

Organization

Hangzhou H3C Technologies Co., Limited

Address

310 Liuhe Road, Zhijiang Science Park Hangzhou Zhejiang, CN 310053

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.