Who owns MAC prefix F4EF9E?

F4EF9E is registered to SGSG SCIENCE & TECHNOLOGY CO. LTD in the IEEE MA-L registry.

What devices use F4EF9E?

Any network device with a MAC address starting F4:EF:9E was manufactured by or for SGSG SCIENCE & TECHNOLOGY CO. LTD.

MA-L · OUI prefix

SGSG SCIENCE & TECHNOLOGY CO. LTD

Any MAC address starting F4:EF:9E is registered to SGSG SCIENCE & TECHNOLOGY CO. LTD in CN.

OUI prefix	F4EF9E
Vendor	SGSG SCIENCE & TECHNOLOGY CO. LTD
Registry	MA-L (24-bit, large block)
Country	CN
Example MAC	F4:EF:9E:00:00:00

What this means

The IEEE assigned the MA-L block F4EF9E to SGSG SCIENCE & TECHNOLOGY CO. LTD. 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 F4:EF:9E, it is SGSG SCIENCE & TECHNOLOGY CO. LTD hardware.

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