Who owns MAC prefix 34EF8B?

34EF8B is registered to NTT DOCOMO BUSINESS, Inc. in the IEEE MA-L registry.

What devices use 34EF8B?

Any network device with a MAC address starting 34:EF:8B was manufactured by or for NTT DOCOMO BUSINESS, Inc..

MA-L · OUI prefix

NTT DOCOMO BUSINESS, Inc.

Any MAC address starting 34:EF:8B is registered to NTT DOCOMO BUSINESS, Inc. in JP.

OUI prefix	34EF8B
Vendor	NTT DOCOMO BUSINESS, Inc.
Registry	MA-L (24-bit, large block)
Country	JP
Example MAC	34:EF:8B:00:00:00

What this means

The IEEE assigned the MA-L block 34EF8B to NTT DOCOMO BUSINESS, Inc.. 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 34:EF:8B, it is NTT DOCOMO BUSINESS, Inc. hardware.

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