What this means
The IEEE assigned the MA-L block 74D637 to Amazon Technologies 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 74:D6:37, it is Amazon Technologies Inc. hardware.
Frequently Asked Questions
Who owns MAC prefix 74D637?
74D637 is registered to Amazon Technologies 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. Amazon Technologies Inc.'s block covers 16,777,216 addresses.
What devices use 74D637?
Any network device with a MAC address starting 74:D6:37 was manufactured by or for Amazon Technologies Inc..