What this means
The IEEE assigned the MA-L block 4099E3 to Guangzhou Mudi 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 40:99:E3, it is Guangzhou Mudi Information Technology Co., Ltd hardware.
Frequently Asked Questions
Who owns MAC prefix 4099E3?
4099E3 is registered to Guangzhou Mudi 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. Guangzhou Mudi Information Technology Co., Ltd's block covers 16,777,216 addresses.
What devices use 4099E3?
Any network device with a MAC address starting 40:99:E3 was manufactured by or for Guangzhou Mudi Information Technology Co., Ltd.