JiangSu NanJing University Electronic Information Technology Co.,Ltd

Any device whose MAC address begins with EC:22:57 has a network interface built by JiangSu NanJing University Electronic Information Technology Co.,Ltd. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

EC:22:57

Organization

JiangSu NanJing University Electronic Information Technology Co.,Ltd

Address

F7,Block 06 NanJing JiangSu CN 210000

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.