What this means
The IEEE assigned the MA-L block 000091 to ANRITSU CORPORATION. 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 00:00:91, it is ANRITSU CORPORATION hardware.
Frequently Asked Questions
Who owns MAC prefix 000091?
000091 is registered to ANRITSU CORPORATION 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. ANRITSU CORPORATION's block covers 16,777,216 addresses.
What devices use 000091?
Any network device with a MAC address starting 00:00:91 was manufactured by or for ANRITSU CORPORATION.