Which company owns MAC address prefix 08:00:83?

MAC address prefix 08:00:83 is registered to Seiko Instruments Inc. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 08:00:83 has a network interface built by Seiko Instruments Inc..

What is the OUI 08:00:83?

08:00:83 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Seiko Instruments Inc.. It covers every address from 08:00:83:00:00:00 to 08:00:83:FF:FF:FF, or 16,777,216 addresses in total. It is also written 08-00-83.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 08:00:83:00:00:00 that is 08:00:83 — 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 Seiko Instruments Inc. located?

Seiko Instruments Inc. is listed at 8, Nakase 1-chome Mihama-ku Chiba-shi Chiba JP 261-8507 in the IEEE OUI registry entry for 08:00:83. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Seiko Instruments Inc.

MAC address prefix 08:00:83 is registered to Seiko Instruments Inc. in the IEEE OUI registry. Any device whose MAC address begins with 08:00:83 has a network interface built by Seiko Instruments 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 08:00:83:00:00:00 to 08:00:83:FF:FF:FF.

OUI prefix: 08:00:83
Hyphen form: 08-00-83
MAC range: 08:00:83:00:00:00 – 08:00:83:FF:FF:FF
Addresses in block: 16,777,216
Organization: Seiko Instruments Inc.
Address: 8, Nakase 1-chome Mihama-ku Chiba-shi Chiba JP 261-8507
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 "Seiko Instruments Inc."
archived source →
2026-07-17Assigned to "Seiko Instruments Inc."

Nearby in the registry

The prefixes assigned immediately before and after 08:00:83:

FAQ

Which company owns MAC address prefix 08:00:83?: MAC address prefix 08:00:83 is registered to Seiko Instruments Inc. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 08:00:83 has a network interface built by Seiko Instruments Inc..
What is the OUI 08:00:83?: 08:00:83 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Seiko Instruments Inc.. It covers every address from 08:00:83:00:00:00 to 08:00:83:FF:FF:FF, or 16,777,216 addresses in total. It is also written 08-00-83.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 08:00:83:00:00:00 that is 08:00:83 — 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 Seiko Instruments Inc. located?: Seiko Instruments Inc. is listed at 8, Nakase 1-chome Mihama-ku Chiba-shi Chiba JP 261-8507 in the IEEE OUI registry entry for 08:00:83. This is the address the organization registered with the IEEE, which may differ from its current operating address.