Who owns MAC prefix F040AFA?

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

What devices use F040AFA?

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

MA-M · OUI prefix

SIEMENS AG

Any MAC address starting F0:40:AF:A is registered to SIEMENS AG in DE.

OUI prefix	F040AFA
Vendor	SIEMENS AG
Registry	MA-M (28-bit, medium block)
Country	DE
Example MAC	F0:40:AF:A:00:00:00

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.

Other SIEMENS AG prefixes

SIEMENS AG holds 23 registered blocks in total.

0001E3 000BA3 000E8C 001B1B 080006 10DFFC 208756 20A8B9 286336 302F1E 30B851 384B24 all 23 »

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