Who owns MAC prefix 503F98?

503F98 is registered to CMITECH in the IEEE MA-L registry.

What devices use 503F98?

Any network device with a MAC address starting 50:3F:98 was manufactured by or for CMITECH.

MA-L · OUI prefix

CMITECH

Any MAC address starting 50:3F:98 is registered to CMITECH in KR.

OUI prefix	503F98
Vendor	CMITECH
Registry	MA-L (24-bit, large block)
Country	KR
Example MAC	50:3F:98:00:00:00

What this means

The IEEE assigned the MA-L block 503F98 to CMITECH. 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 50:3F:98, it is CMITECH hardware.

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