What this means
The IEEE assigned the MA-L block C42C7B to VIETNAM POST AND TELECOMMUNICATION INDUSTRY TECHNOLOGY JOIN STOCK COMPANY. 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 C4:2C:7B, it is VIETNAM POST AND TELECOMMUNICATION INDUSTRY TECHNOLOGY JOIN STOCK COMPANY hardware.
Frequently Asked Questions
Who owns MAC prefix C42C7B?
C42C7B is registered to VIETNAM POST AND TELECOMMUNICATION INDUSTRY TECHNOLOGY JOIN STOCK COMPANY 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. VIETNAM POST AND TELECOMMUNICATION INDUSTRY TECHNOLOGY JOIN STOCK COMPANY's block covers 16,777,216 addresses.
What devices use C42C7B?
Any network device with a MAC address starting C4:2C:7B was manufactured by or for VIETNAM POST AND TELECOMMUNICATION INDUSTRY TECHNOLOGY JOIN STOCK COMPANY.