Which company owns MAC address prefix 70:4C:C1?

MAC address prefix 70:4C:C1 is registered to Tokyo Electron Miyagi Limited in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 70:4C:C1 has a network interface built by Tokyo Electron Miyagi Limited.

What is the OUI 70:4C:C1?

70:4C:C1 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Tokyo Electron Miyagi Limited. It covers every address from 70:4C:C1:00:00:00 to 70:4C:C1:FF:FF:FF, or 16,777,216 addresses in total. It is also written 70-4C-C1.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 70:4C:C1:00:00:00 that is 70:4C:C1 — 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 Tokyo Electron Miyagi Limited located?

Tokyo Electron Miyagi Limited is listed at 1 Techno-Hills Taiwa-cho, Kurokawa-gun Miyagi JP 981-3629 in the IEEE OUI registry entry for 70:4C:C1. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Tokyo Electron Miyagi Limited

MAC address prefix 70:4C:C1 is registered to Tokyo Electron Miyagi Limited in the IEEE OUI registry. Any device whose MAC address begins with 70:4C:C1 has a network interface built by Tokyo Electron Miyagi Limited. 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 70:4C:C1:00:00:00 to 70:4C:C1:FF:FF:FF.

OUI prefix: 70:4C:C1
Hyphen form: 70-4C-C1
MAC range: 70:4C:C1:00:00:00 – 70:4C:C1:FF:FF:FF
Addresses in block: 16,777,216
Organization: Tokyo Electron Miyagi Limited
Address: 1 Techno-Hills Taiwa-cho, Kurokawa-gun Miyagi JP 981-3629
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 (1)

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

2026-07-17Assigned to "Tokyo Electron Miyagi Limited"

Nearby in the registry

The prefixes assigned immediately before and after 70:4C:C1:

FAQ

Which company owns MAC address prefix 70:4C:C1?: MAC address prefix 70:4C:C1 is registered to Tokyo Electron Miyagi Limited in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 70:4C:C1 has a network interface built by Tokyo Electron Miyagi Limited.
What is the OUI 70:4C:C1?: 70:4C:C1 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Tokyo Electron Miyagi Limited. It covers every address from 70:4C:C1:00:00:00 to 70:4C:C1:FF:FF:FF, or 16,777,216 addresses in total. It is also written 70-4C-C1.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 70:4C:C1:00:00:00 that is 70:4C:C1 — 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 Tokyo Electron Miyagi Limited located?: Tokyo Electron Miyagi Limited is listed at 1 Techno-Hills Taiwa-cho, Kurokawa-gun Miyagi JP 981-3629 in the IEEE OUI registry entry for 70:4C:C1. This is the address the organization registered with the IEEE, which may differ from its current operating address.