Which company owns MAC address prefix C0:C9:46?

MAC address prefix C0:C9:46 is registered to MITSUYA LABORATORIES INC. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with C0:C9:46 has a network interface built by MITSUYA LABORATORIES INC..

What is the OUI C0:C9:46?

C0:C9:46 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to MITSUYA LABORATORIES INC.. It covers every address from C0:C9:46:00:00:00 to C0:C9:46:FF:FF:FF, or 16,777,216 addresses in total. It is also written C0-C9-46.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in C0:C9:46:00:00:00 that is C0:C9:46 — 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 MITSUYA LABORATORIES INC. located?

MITSUYA LABORATORIES INC. is listed at 6-31-18 KAWASAKI-CITY KANAGAWA JP 215-0021 in the IEEE OUI registry entry for C0:C9:46. This is the address the organization registered with the IEEE, which may differ from its current operating address.

MITSUYA LABORATORIES INC.

MAC address prefix C0:C9:46 is registered to MITSUYA LABORATORIES INC. in the IEEE OUI registry. Any device whose MAC address begins with C0:C9:46 has a network interface built by MITSUYA LABORATORIES INC.. 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 C0:C9:46:00:00:00 to C0:C9:46:FF:FF:FF.

OUI prefix: C0:C9:46
Hyphen form: C0-C9-46
MAC range: C0:C9:46:00:00:00 – C0:C9:46:FF:FF:FF
Addresses in block: 16,777,216
Organization: MITSUYA LABORATORIES INC.
Address: 6-31-18 KAWASAKI-CITY KANAGAWA JP 215-0021
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 "MITSUYA LABORATORIES INC."
archived source →
2026-07-17Assigned to "MITSUYA LABORATORIES INC."

Nearby in the registry

The prefixes assigned immediately before and after C0:C9:46:

FAQ

Which company owns MAC address prefix C0:C9:46?: MAC address prefix C0:C9:46 is registered to MITSUYA LABORATORIES INC. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with C0:C9:46 has a network interface built by MITSUYA LABORATORIES INC..
What is the OUI C0:C9:46?: C0:C9:46 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to MITSUYA LABORATORIES INC.. It covers every address from C0:C9:46:00:00:00 to C0:C9:46:FF:FF:FF, or 16,777,216 addresses in total. It is also written C0-C9-46.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in C0:C9:46:00:00:00 that is C0:C9:46 — 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 MITSUYA LABORATORIES INC. located?: MITSUYA LABORATORIES INC. is listed at 6-31-18 KAWASAKI-CITY KANAGAWA JP 215-0021 in the IEEE OUI registry entry for C0:C9:46. This is the address the organization registered with the IEEE, which may differ from its current operating address.