What this means
The IEEE assigned the MA-L block 241B13 to Shanghai Nutshell Electronic 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 24:1B:13, it is Shanghai Nutshell Electronic Co., Ltd. hardware.
Frequently Asked Questions
Who owns MAC prefix 241B13?
241B13 is registered to Shanghai Nutshell Electronic 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. Shanghai Nutshell Electronic Co., Ltd.'s block covers 16,777,216 addresses.
What devices use 241B13?
Any network device with a MAC address starting 24:1B:13 was manufactured by or for Shanghai Nutshell Electronic Co., Ltd..