Sercomm Corporation.

Any device whose MAC address begins with 3C:98:72 has a network interface built by Sercomm Corporation.. 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:98:72

Organization

Sercomm Corporation.

Address

3F,No.81,Yu-Yih Rd.,Chu-Nan Chen Miao-Lih Hsuan TW 115

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.