Extreme Networks, Inc. - MAC Prefix 5858CD (MA-L)

What this means

The IEEE assigned the MA-L block 5858CD 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 58:58:CD, it is Extreme Networks, Inc. hardware.

Frequently Asked Questions

Who owns MAC prefix 5858CD?

5858CD 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 5858CD?

Any network device with a MAC address starting 58:58:CD was manufactured by or for Extreme Networks, Inc..

Other Extreme Networks, Inc. prefixes

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

OUI prefix	5858CD
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	58:58:CD:00:00:00