What this means
The IEEE assigned the MA-L block 30EFD1 to Alstom Strongwish (Shenzhen) 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 30:EF:D1, it is Alstom Strongwish (Shenzhen) Co., Ltd. hardware.
Frequently Asked Questions
Who owns MAC prefix 30EFD1?
30EFD1 is registered to Alstom Strongwish (Shenzhen) 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. Alstom Strongwish (Shenzhen) Co., Ltd.'s block covers 16,777,216 addresses.
What devices use 30EFD1?
Any network device with a MAC address starting 30:EF:D1 was manufactured by or for Alstom Strongwish (Shenzhen) Co., Ltd..