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..

MA-L · OUI prefix

ENT-EMPRESA NACIONAL DE TELECOMMUNICACOES, S.A.

Q: Who owns MAC prefix 0090CD?

0090CD is registered to ENT-EMPRESA NACIONAL DE TELECOMMUNICACOES, S.A. in the IEEE MA-L registry.

Any MAC address starting 00:90:CD is registered to ENT-EMPRESA NACIONAL DE TELECOMMUNICACOES, S.A. in PT.

OUI prefix	0090CD
Vendor	ENT-EMPRESA NACIONAL DE TELECOMMUNICACOES, S.A.
Registry	MA-L (24-bit, large block)
Country	PT
Example MAC	00:90:CD:00:00:00

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.

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