Who owns MAC prefix ECB5AF?

ECB5AF is registered to RayService a.s. in the IEEE MA-L registry.

What devices use ECB5AF?

Any network device with a MAC address starting EC:B5:AF was manufactured by or for RayService a.s..

MA-L · OUI prefix

RayService a.s.

Any MAC address starting EC:B5:AF is registered to RayService a.s..

OUI prefix	ECB5AF
Vendor	RayService a.s.
Registry	MA-L (24-bit, large block)
Example MAC	EC:B5:AF:00:00:00

What this means

The IEEE assigned the MA-L block ECB5AF to RayService a.s.. 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 EC:B5:AF, it is RayService a.s. hardware.

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