What this means
The IEEE assigned the MA-L block 5C5DEC to JiangSu Newcom Optical&Electrical Communication 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 5C:5D:EC, it is JiangSu Newcom Optical&Electrical Communication CO Ltd hardware.
Frequently Asked Questions
Who owns MAC prefix 5C5DEC?
5C5DEC is registered to JiangSu Newcom Optical&Electrical Communication 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. JiangSu Newcom Optical&Electrical Communication CO Ltd's block covers 16,777,216 addresses.
What devices use 5C5DEC?
Any network device with a MAC address starting 5C:5D:EC was manufactured by or for JiangSu Newcom Optical&Electrical Communication CO Ltd.