What this means
The IEEE assigned the MA-L block 049F81 to NETSCOUT SYSTEMS INC. 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 04:9F:81, it is NETSCOUT SYSTEMS INC hardware.
Frequently Asked Questions
Who owns MAC prefix 049F81?
049F81 is registered to NETSCOUT SYSTEMS INC 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. NETSCOUT SYSTEMS INC's block covers 16,777,216 addresses.
What devices use 049F81?
Any network device with a MAC address starting 04:9F:81 was manufactured by or for NETSCOUT SYSTEMS INC.