What this means
The IEEE assigned the MA-L block DC9F1F to Aseko, spol. s r.o.. 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 DC:9F:1F, it is Aseko, spol. s r.o. hardware.
Frequently Asked Questions
Who owns MAC prefix DC9F1F?
DC9F1F is registered to Aseko, spol. s r.o. 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. Aseko, spol. s r.o.'s block covers 16,777,216 addresses.
What devices use DC9F1F?
Any network device with a MAC address starting DC:9F:1F was manufactured by or for Aseko, spol. s r.o..