What this means
The IEEE assigned the MA-L block EC2257 to JiangSu NanJing University Electronic Information Technology Co.,Ltd. Every network interface they manufacture under this block has a MAC address beginning with these digits, followed by a unique per-device identifier. If a device on your network shows a MAC starting EC:22:57, it is JiangSu NanJing University Electronic Information Technology Co.,Ltd hardware.
Frequently Asked Questions
Who owns MAC prefix EC2257?
EC2257 is registered to JiangSu NanJing University Electronic Information Technology Co.,Ltd in the IEEE MA-L registry.
What does the MA-L registry type mean?
An MA-L assignment, the IEEE's original OUI format, gives the vendor the first three octets and 16,777,216 device addresses under them. JiangSu NanJing University Electronic Information Technology Co.,Ltd's block covers 16,777,216 addresses.
What devices use EC2257?
Any network device with a MAC address starting EC:22:57 was manufactured by or for JiangSu NanJing University Electronic Information Technology Co.,Ltd.