What this means
The IEEE assigned the MA-L block 001D31 to HIGHPRO INTERNATIONAL R&D 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 00:1D:31, it is HIGHPRO INTERNATIONAL R&D CO,.LTD. hardware.
Frequently Asked Questions
Who owns MAC prefix 001D31?
001D31 is registered to HIGHPRO INTERNATIONAL R&D 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. HIGHPRO INTERNATIONAL R&D CO,.LTD.'s block covers 16,777,216 addresses.
What devices use 001D31?
Any network device with a MAC address starting 00:1D:31 was manufactured by or for HIGHPRO INTERNATIONAL R&D CO,.LTD..