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.
Frequently Asked Questions
Who owns MAC prefix 34EF8B?
34EF8B is registered to NTT DOCOMO BUSINESS, Inc. in the IEEE MA-L registry.
What does the MA-L registry type mean?
An MA-L assignment, the IEEE's original OUI format, gives the vendor the first three octets and 16,777,216 device addresses under them. NTT DOCOMO BUSINESS, Inc.'s block covers 16,777,216 addresses.
What devices use 34EF8B?
Any network device with a MAC address starting 34:EF:8B was manufactured by or for NTT DOCOMO BUSINESS, Inc..