What this means
The IEEE assigned the MA-L block A4EF52 to Telewave 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 A4:EF:52, it is Telewave Co., Ltd. hardware.
Frequently Asked Questions
Who owns MAC prefix A4EF52?
A4EF52 is registered to Telewave 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. Telewave Co., Ltd.'s block covers 16,777,216 addresses.
What devices use A4EF52?
Any network device with a MAC address starting A4:EF:52 was manufactured by or for Telewave Co., Ltd..