What this means
The IEEE assigned the MA-L block 683B1E to Countwise 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 68:3B:1E, it is Countwise LTD hardware.
Frequently Asked Questions
Who owns MAC prefix 683B1E?
683B1E is registered to Countwise 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. Countwise LTD's block covers 16,777,216 addresses.
What devices use 683B1E?
Any network device with a MAC address starting 68:3B:1E was manufactured by or for Countwise LTD.