Which company owns MAC address prefix C8:F3:6B?

MAC address prefix C8:F3:6B is registered to Yamato Scale Co.,Ltd. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with C8:F3:6B has a network interface built by Yamato Scale Co.,Ltd..

What is the OUI C8:F3:6B?

C8:F3:6B is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Yamato Scale Co.,Ltd.. It covers every address from C8:F3:6B:00:00:00 to C8:F3:6B:FF:FF:FF, or 16,777,216 addresses in total. It is also written C8-F3-6B.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in C8:F3:6B:00:00:00 that is C8:F3:6B — 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 Yamato Scale Co.,Ltd. located?

Yamato Scale Co.,Ltd. is listed at 5-22 Akashi Hyogo JP 673-8688 in the IEEE OUI registry entry for C8:F3:6B. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Yamato Scale Co.,Ltd.

MAC address prefix C8:F3:6B is registered to Yamato Scale Co.,Ltd. in the IEEE OUI registry. Any device whose MAC address begins with C8:F3:6B has a network interface built by Yamato Scale 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 C8:F3:6B:00:00:00 to C8:F3:6B:FF:FF:FF.

OUI prefix: C8:F3:6B
Hyphen form: C8-F3-6B
MAC range: C8:F3:6B:00:00:00 – C8:F3:6B:FF:FF:FF
Addresses in block: 16,777,216
Organization: Yamato Scale Co.,Ltd.
Address: 5-22 Akashi Hyogo JP 673-8688
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.

2016-07-29Assigned to "Yamato Scale Co.,Ltd."
archived source →
2026-07-17Assigned to "Yamato Scale Co.,Ltd."

Nearby in the registry

The prefixes assigned immediately before and after C8:F3:6B:

FAQ

Which company owns MAC address prefix C8:F3:6B?: MAC address prefix C8:F3:6B is registered to Yamato Scale Co.,Ltd. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with C8:F3:6B has a network interface built by Yamato Scale Co.,Ltd..
What is the OUI C8:F3:6B?: C8:F3:6B is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Yamato Scale Co.,Ltd.. It covers every address from C8:F3:6B:00:00:00 to C8:F3:6B:FF:FF:FF, or 16,777,216 addresses in total. It is also written C8-F3-6B.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in C8:F3:6B:00:00:00 that is C8:F3:6B — 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 Yamato Scale Co.,Ltd. located?: Yamato Scale Co.,Ltd. is listed at 5-22 Akashi Hyogo JP 673-8688 in the IEEE OUI registry entry for C8:F3:6B. This is the address the organization registered with the IEEE, which may differ from its current operating address.