ParanTek Inc.

Any device whose MAC address begins with 64:5C:F3 has a network interface built by ParanTek Inc.. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

64:5C:F3

Organization

ParanTek Inc.

Address

3F, 40-15 Gilju-Ro, 411 Beon-Gil Wonmi-Gu, Bucheon City Gyeonggi-Do KR 14488

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.