What this means
The IEEE assigned the MA-L block ACE403 to Shenzhen Visteng 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 AC:E4:03, it is Shenzhen Visteng Technology CO.,LTD hardware.
Frequently Asked Questions
Who owns MAC prefix ACE403?
ACE403 is registered to Shenzhen Visteng 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. Shenzhen Visteng Technology CO.,LTD's block covers 16,777,216 addresses.
What devices use ACE403?
Any network device with a MAC address starting AC:E4:03 was manufactured by or for Shenzhen Visteng Technology CO.,LTD.