What this means
The IEEE assigned the MA-L block 4CD637 to Qsono Electronics 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 4C:D6:37, it is Qsono Electronics Co., Ltd hardware.
Frequently Asked Questions
Who owns MAC prefix 4CD637?
4CD637 is registered to Qsono Electronics 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. Qsono Electronics Co., Ltd's block covers 16,777,216 addresses.
What devices use 4CD637?
Any network device with a MAC address starting 4C:D6:37 was manufactured by or for Qsono Electronics Co., Ltd.