OCOSMOS Co., LTD MAC Addresses

Primary OUI: D4:40:D0:
Total OUIs: 2
Last Updated: July 3, 2026

This page provides information about MAC addresses and OUIs assigned to OCOSMOS Co., LTD. The Organizationally Unique Identifier (OUI) is the first 24 bits of a MAC address and is assigned by the IEEE to uniquely identify a vendor or manufacturer.

About OCOSMOS Co., LTD MAC Addresses

MAC addresses beginning with D4:40:D0: are manufactured by OCOSMOS Co., LTD. When you see a device on your network with this OUI prefix, it indicates that the device was manufactured by OCOSMOS Co., LTD.

The IEEE assigns OUI prefixes to manufacturers to ensure uniqueness in the global networking ecosystem. OCOSMOS Co., LTD has been assigned the OUI prefix D440D0 (among others) for use in their network devices.

Common OCOSMOS Co., LTD Devices

Devices manufactured by OCOSMOS Co., LTD that you might encounter on networks include:

  • Network interface cards (NICs)
  • Routers and switches
  • Wireless access points
  • IoT devices
  • Embedded systems
  • And other networking equipment

Identifying OCOSMOS Co., LTD Devices on Your Network

To identify OCOSMOS Co., LTD devices on your network:

  1. Use network scanning tools to list devices on your network
  2. Look for MAC addresses starting with any of the OUI prefixes listed in the sidebar
  3. Use our MAC address lookup tool to confirm the manufacturer

This can be particularly helpful for network inventory, troubleshooting, and security auditing.

MAC Address Format

A complete MAC address consists of 48 bits (6 bytes) and is typically represented in hexadecimal format with each byte separated by a colon or a hyphen. For OCOSMOS Co., LTD devices, the MAC address would look like:

D4:40:D0:XX:XX:XX

The first three bytes (D4:40:D0) identify the manufacturer as OCOSMOS Co., LTD, while the last three bytes are unique to each device.

OCOSMOS Co., LTD OUI Prefixes

Lookup a MAC Address

Need to identify a different device? Use our MAC address lookup tool to find the manufacturer of any network device.