What this means
The IEEE assigned the MA-L block 900A1A to Taicang T&W Electronics. 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 90:0A:1A, it is Taicang T&W Electronics hardware.
Frequently Asked Questions
Who owns MAC prefix 900A1A?
900A1A is registered to Taicang T&W Electronics 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. Taicang T&W Electronics's block covers 16,777,216 addresses.
What devices use 900A1A?
Any network device with a MAC address starting 90:0A:1A was manufactured by or for Taicang T&W Electronics.