Which company owns MAC address prefix 68:E6:D4?

MAC address prefix 68:E6:D4 is registered to FURUNO SYSTEMS CO.,LTD. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 68:E6:D4 has a network interface built by FURUNO SYSTEMS CO.,LTD..

What is the OUI 68:E6:D4?

68:E6:D4 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to FURUNO SYSTEMS CO.,LTD.. It covers every address from 68:E6:D4:00:00:00 to 68:E6:D4:FF:FF:FF, or 16,777,216 addresses in total. It is also written 68-E6-D4.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 68:E6:D4:00:00:00 that is 68:E6:D4 — and look that prefix up in the IEEE OUI registry. If the second-lowest bit of the first octet is set, the address is locally administered (a randomized or private MAC), which belongs to no manufacturer and will not resolve; modern phones and laptops use these by default on each network.

Where is FURUNO SYSTEMS CO.,LTD. located?

FURUNO SYSTEMS CO.,LTD. is listed at 6F, JEI Ryogoku Building, 3-25-5 Ryogoku Sumida-ku Tokyo JP 130-0026 in the IEEE OUI registry entry for 68:E6:D4. This is the address the organization registered with the IEEE, which may differ from its current operating address.

FURUNO SYSTEMS CO.,LTD.

MAC address prefix 68:E6:D4 is registered to FURUNO SYSTEMS CO.,LTD. in the IEEE OUI registry. Any device whose MAC address begins with 68:E6:D4 has a network interface built by FURUNO SYSTEMS CO.,LTD.. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address — it covers every MAC from 68:E6:D4:00:00:00 to 68:E6:D4:FF:FF:FF.

OUI prefix: 68:E6:D4
Hyphen form: 68-E6-D4
MAC range: 68:E6:D4:00:00:00 – 68:E6:D4:FF:FF:FF
Addresses in block: 16,777,216
Organization: FURUNO SYSTEMS CO.,LTD.
Address: 6F, JEI Ryogoku Building, 3-25-5 Ryogoku Sumida-ku Tokyo JP 130-0026
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.

Assignment history (2)

The IEEE registry publishes current state only — this is the change record we've kept since we started tracking it daily.

2026-01-08Assigned to "FURUNO SYSTEMS CO.,LTD."
archived source →
2026-07-17Assigned to "FURUNO SYSTEMS CO.,LTD."

Nearby in the registry

The prefixes assigned immediately before and after 68:E6:D4:

FAQ

Which company owns MAC address prefix 68:E6:D4?: MAC address prefix 68:E6:D4 is registered to FURUNO SYSTEMS CO.,LTD. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 68:E6:D4 has a network interface built by FURUNO SYSTEMS CO.,LTD..
What is the OUI 68:E6:D4?: 68:E6:D4 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to FURUNO SYSTEMS CO.,LTD.. It covers every address from 68:E6:D4:00:00:00 to 68:E6:D4:FF:FF:FF, or 16,777,216 addresses in total. It is also written 68-E6-D4.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 68:E6:D4:00:00:00 that is 68:E6:D4 — and look that prefix up in the IEEE OUI registry. If the second-lowest bit of the first octet is set, the address is locally administered (a randomized or private MAC), which belongs to no manufacturer and will not resolve; modern phones and laptops use these by default on each network.
Where is FURUNO SYSTEMS CO.,LTD. located?: FURUNO SYSTEMS CO.,LTD. is listed at 6F, JEI Ryogoku Building, 3-25-5 Ryogoku Sumida-ku Tokyo JP 130-0026 in the IEEE OUI registry entry for 68:E6:D4. This is the address the organization registered with the IEEE, which may differ from its current operating address.