What this means
The IEEE assigned the MA-L block 1840A4 to Shenzhen Trylong Smart Science and Technology Co., Ltd.. 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 18:40:A4, it is Shenzhen Trylong Smart Science and Technology Co., Ltd. hardware.
Frequently Asked Questions
Who owns MAC prefix 1840A4?
1840A4 is registered to Shenzhen Trylong Smart Science and Technology Co., Ltd. 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. Shenzhen Trylong Smart Science and Technology Co., Ltd.'s block covers 16,777,216 addresses.
What devices use 1840A4?
Any network device with a MAC address starting 18:40:A4 was manufactured by or for Shenzhen Trylong Smart Science and Technology Co., Ltd..