What this means
The IEEE assigned the MA-L block 000021 to SUREMAN COMP. & COMMUN. CORP.. 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 00:00:21, it is SUREMAN COMP. & COMMUN. CORP. hardware.
Frequently Asked Questions
Who owns MAC prefix 000021?
000021 is registered to SUREMAN COMP. & COMMUN. CORP. 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. SUREMAN COMP. & COMMUN. CORP.'s block covers 16,777,216 addresses.
What devices use 000021?
Any network device with a MAC address starting 00:00:21 was manufactured by or for SUREMAN COMP. & COMMUN. CORP..