Which company owns MAC address prefix 00:10:38?

MAC address prefix 00:10:38 is registered to Micro Research Ltd. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 00:10:38 has a network interface built by Micro Research Ltd..

What is the OUI 00:10:38?

00:10:38 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Micro Research Ltd.. It covers every address from 00:10:38:00:00:00 to 00:10:38:FF:FF:FF, or 16,777,216 addresses in total. It is also written 00-10-38.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 00:10:38:00:00:00 that is 00:10:38 — 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 Micro Research Ltd. located?

Micro Research Ltd. is listed at 2F Minami-Shinagawa N Bldg., 2-2-10 Minami-Shinagawa Tokyo Shinagawa-Ku JP 140-0004 in the IEEE OUI registry entry for 00:10:38. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Micro Research Ltd.

MAC address prefix 00:10:38 is registered to Micro Research Ltd. in the IEEE OUI registry. Any device whose MAC address begins with 00:10:38 has a network interface built by Micro Research 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 00:10:38:00:00:00 to 00:10:38:FF:FF:FF.

OUI prefix: 00:10:38
Hyphen form: 00-10-38
MAC range: 00:10:38:00:00:00 – 00:10:38:FF:FF:FF
Addresses in block: 16,777,216
Organization: Micro Research Ltd.
Address: 2F Minami-Shinagawa N Bldg., 2-2-10 Minami-Shinagawa Tokyo Shinagawa-Ku JP 140-0004
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 (3)

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 "MICRO RESEARCH INSTITUTE, INC."
archived source →
2020-03-21Renamed from "MICRO RESEARCH INSTITUTE, INC." to "Micro Research Ltd."
archived source →
2026-07-17Assigned to "Micro Research Ltd."

Nearby in the registry

The prefixes assigned immediately before and after 00:10:38:

FAQ

Which company owns MAC address prefix 00:10:38?: MAC address prefix 00:10:38 is registered to Micro Research Ltd. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 00:10:38 has a network interface built by Micro Research Ltd..
What is the OUI 00:10:38?: 00:10:38 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Micro Research Ltd.. It covers every address from 00:10:38:00:00:00 to 00:10:38:FF:FF:FF, or 16,777,216 addresses in total. It is also written 00-10-38.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 00:10:38:00:00:00 that is 00:10:38 — 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 Micro Research Ltd. located?: Micro Research Ltd. is listed at 2F Minami-Shinagawa N Bldg., 2-2-10 Minami-Shinagawa Tokyo Shinagawa-Ku JP 140-0004 in the IEEE OUI registry entry for 00:10:38. This is the address the organization registered with the IEEE, which may differ from its current operating address.