What this means
The IEEE assigned the MA-L block 001B58 to ACE CAD Enterprise 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 00:1B:58, it is ACE CAD Enterprise Co., Ltd. hardware.
Frequently Asked Questions
Who owns MAC prefix 001B58?
001B58 is registered to ACE CAD Enterprise 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. ACE CAD Enterprise Co., Ltd.'s block covers 16,777,216 addresses.
What devices use 001B58?
Any network device with a MAC address starting 00:1B:58 was manufactured by or for ACE CAD Enterprise Co., Ltd..