What this means
The IEEE assigned the MA-L block 7C90E9 to GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP.,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 7C:90:E9, it is GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP.,LTD hardware.
Frequently Asked Questions
Who owns MAC prefix 7C90E9?
7C90E9 is registered to GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP.,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. GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP.,LTD's block covers 16,777,216 addresses.
What devices use 7C90E9?
Any network device with a MAC address starting 7C:90:E9 was manufactured by or for GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP.,LTD.