What this means
The IEEE assigned the MA-L block 000A03 to ENDESA SERVICIOS, S.L.. 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 00:0A:03, it is ENDESA SERVICIOS, S.L. hardware.
Frequently Asked Questions
Who owns MAC prefix 000A03?
000A03 is registered to ENDESA SERVICIOS, S.L. 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. ENDESA SERVICIOS, S.L.'s block covers 16,777,216 addresses.
What devices use 000A03?
Any network device with a MAC address starting 00:0A:03 was manufactured by or for ENDESA SERVICIOS, S.L..