What this means
The IEEE assigned the MA-L block A0AC78 to Shenzhen iComm Semiconductor 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 A0:AC:78, it is Shenzhen iComm Semiconductor CO.,LTD hardware.
Frequently Asked Questions
Who owns MAC prefix A0AC78?
A0AC78 is registered to Shenzhen iComm Semiconductor 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 iComm Semiconductor CO.,LTD's block covers 16,777,216 addresses.
What devices use A0AC78?
Any network device with a MAC address starting A0:AC:78 was manufactured by or for Shenzhen iComm Semiconductor CO.,LTD.