What this means
The IEEE assigned the MA-L block 0090CD to ENT-EMPRESA NACIONAL DE TELECOMMUNICACOES, S.A.. 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 00:90:CD, it is ENT-EMPRESA NACIONAL DE TELECOMMUNICACOES, S.A. hardware.
Frequently Asked Questions
Who owns MAC prefix 0090CD?
0090CD is registered to ENT-EMPRESA NACIONAL DE TELECOMMUNICACOES, S.A. 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. ENT-EMPRESA NACIONAL DE TELECOMMUNICACOES, S.A.'s block covers 16,777,216 addresses.
What devices use 0090CD?
Any network device with a MAC address starting 00:90:CD was manufactured by or for ENT-EMPRESA NACIONAL DE TELECOMMUNICACOES, S.A..