What this means
The IEEE assigned the MA-L block 503A0F to ALL Winner (Hong Kong) Limited. 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 50:3A:0F, it is ALL Winner (Hong Kong) Limited hardware.
Frequently Asked Questions
Who owns MAC prefix 503A0F?
503A0F is registered to ALL Winner (Hong Kong) Limited 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. ALL Winner (Hong Kong) Limited's block covers 16,777,216 addresses.
What devices use 503A0F?
Any network device with a MAC address starting 50:3A:0F was manufactured by or for ALL Winner (Hong Kong) Limited.