What this means
The IEEE assigned the MA-L block BCA37F to Rail-Mil Sp. z o.o. Sp. K.. 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 BC:A3:7F, it is Rail-Mil Sp. z o.o. Sp. K. hardware.
Frequently Asked Questions
Who owns MAC prefix BCA37F?
BCA37F is registered to Rail-Mil Sp. z o.o. Sp. K. 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. Rail-Mil Sp. z o.o. Sp. K.'s block covers 16,777,216 addresses.
What devices use BCA37F?
Any network device with a MAC address starting BC:A3:7F was manufactured by or for Rail-Mil Sp. z o.o. Sp. K..