What this means
The IEEE assigned the MA-L block D49EEC to TOPSUN (VIETNAM) COMPANY LIMITED. 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 D4:9E:EC, it is TOPSUN (VIETNAM) COMPANY LIMITED hardware.
Frequently Asked Questions
Who owns MAC prefix D49EEC?
D49EEC is registered to TOPSUN (VIETNAM) COMPANY LIMITED 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. TOPSUN (VIETNAM) COMPANY LIMITED's block covers 16,777,216 addresses.
What devices use D49EEC?
Any network device with a MAC address starting D4:9E:EC was manufactured by or for TOPSUN (VIETNAM) COMPANY LIMITED.