Seiko Epson Corporation
Any device whose MAC address begins with A4:D7:3C has a network interface built by Seiko Epson Corporation. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.
- OUI prefix
- A4:D7:3C
- Organization
- Seiko Epson Corporation
- Address
- 2070 Kotobuki Koaka Matsumoto-shi Nagano-ken JP 399-8702
- Source
- IEEE OUI registry
Have a full MAC address? Look it up— we'll also tell you if it's a randomized (private) address rather than a real manufacturer prefix.