Extreme Networks, Inc. - MAC Prefix AC4DD9 (MA-L)

What this means

The IEEE assigned the MA-L block AC4DD9 to Extreme Networks, 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 AC:4D:D9, it is Extreme Networks, Inc. hardware.

Frequently Asked Questions

Who owns MAC prefix AC4DD9?

AC4DD9 is registered to Extreme Networks, 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. Extreme Networks, Inc.'s block covers 16,777,216 addresses.

What devices use AC4DD9?

Any network device with a MAC address starting AC:4D:D9 was manufactured by or for Extreme Networks, Inc..

Other Extreme Networks, Inc. prefixes

Extreme Networks, Inc. holds 100 registered blocks in total.

OUI prefix	AC4DD9
Vendor	Extreme Networks, Inc.
Registry	MA-L (24-bit, large block)
Block size	16,777,216 addresses
Country	US
Other blocks by this vendor	100 total
Example MAC	AC:4D:D9:00:00:00