What this means
The IEEE assigned the MA-L block 00A003 to Siemens Switzerland Ltd., I B T HVP. 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 00:A0:03, it is Siemens Switzerland Ltd., I B T HVP hardware.
Frequently Asked Questions
Who owns MAC prefix 00A003?
00A003 is registered to Siemens Switzerland Ltd., I B T HVP 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. Siemens Switzerland Ltd., I B T HVP's block covers 16,777,216 addresses.
What devices use 00A003?
Any network device with a MAC address starting 00:A0:03 was manufactured by or for Siemens Switzerland Ltd., I B T HVP.