SIEMENS AG - MAC Prefix F040AFA (MA-M)

What this means

The IEEE assigned the MA-M block F040AFA to SIEMENS AG. 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 F0:40:AF:A, it is SIEMENS AG hardware.

Frequently Asked Questions

Who owns MAC prefix F040AFA?

F040AFA is registered to SIEMENS AG in the IEEE MA-M registry.

What does the MA-M registry type mean?

An MA-M assignment covers 28 bits of the address, giving the vendor 1,048,576 device addresses, a quarter of a full MA-L block. SIEMENS AG's block covers 1,048,576 addresses.

What devices use F040AFA?

Any network device with a MAC address starting F0:40:AF:A was manufactured by or for SIEMENS AG.

Other SIEMENS AG prefixes

SIEMENS AG holds 23 registered blocks in total.

OUI prefix	F040AFA
Vendor	SIEMENS AG
Registry	MA-M (28-bit, medium block)
Block size	1,048,576 addresses
Country	DE
Other blocks by this vendor	23 total
Example MAC	F0:40:AF:A:00:00:00