LeapComm Communication Technologies Inc.

Any device whose MAC address begins with 00:12:57 has a network interface built by LeapComm Communication Technologies 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

00:12:57

Organization

LeapComm Communication Technologies Inc.

Address

RM1804-05 South Tower Hong Kong Plaza, No.283 Huaihai Zhong Road Shanghai CN 200021

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.