What this means
The IEEE assigned the MA-L block 74A4A7 to QRS Music Technologies, Inc.. 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 74:A4:A7, it is QRS Music Technologies, Inc. hardware.
Frequently Asked Questions
Who owns MAC prefix 74A4A7?
74A4A7 is registered to QRS Music Technologies, Inc. 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. QRS Music Technologies, Inc.'s block covers 16,777,216 addresses.
What devices use 74A4A7?
Any network device with a MAC address starting 74:A4:A7 was manufactured by or for QRS Music Technologies, Inc..