What this means
The IEEE assigned the MA-L block AC587B to JCT Healthcare. 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 AC:58:7B, it is JCT Healthcare hardware.
Frequently Asked Questions
Who owns MAC prefix AC587B?
AC587B is registered to JCT Healthcare 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. JCT Healthcare's block covers 16,777,216 addresses.
What devices use AC587B?
Any network device with a MAC address starting AC:58:7B was manufactured by or for JCT Healthcare.