What this means
The IEEE assigned the MA-L block F86691 to Sichuan Tianyi Comheart Telecom 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 F8:66:91, it is Sichuan Tianyi Comheart Telecom Co.,LTD hardware.
Frequently Asked Questions
Who owns MAC prefix F86691?
F86691 is registered to Sichuan Tianyi Comheart Telecom 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. Sichuan Tianyi Comheart Telecom Co.,LTD's block covers 16,777,216 addresses.
What devices use F86691?
Any network device with a MAC address starting F8:66:91 was manufactured by or for Sichuan Tianyi Comheart Telecom Co.,LTD.