What this means
The IEEE assigned the MA-L block A4D73C to Seiko Epson Corporation. 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 A4:D7:3C, it is Seiko Epson Corporation hardware.
Frequently Asked Questions
Who owns MAC prefix A4D73C?
A4D73C is registered to Seiko Epson Corporation 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. Seiko Epson Corporation's block covers 16,777,216 addresses.
What devices use A4D73C?
Any network device with a MAC address starting A4:D7:3C was manufactured by or for Seiko Epson Corporation.