Which company owns MAC address prefix 38:97:A4?

MAC address prefix 38:97:A4 is registered to ELECOM CO.,LTD. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 38:97:A4 has a network interface built by ELECOM CO.,LTD..

What is the OUI 38:97:A4?

38:97:A4 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to ELECOM CO.,LTD.. It covers every address from 38:97:A4:00:00:00 to 38:97:A4:FF:FF:FF, or 16,777,216 addresses in total. It is also written 38-97-A4.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 38:97:A4:00:00:00 that is 38:97:A4 — 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 ELECOM CO.,LTD. located?

ELECOM CO.,LTD. is listed at 2F Kudan First Place Bldg. 4-1-28 Chiyoda-ku Kudan Kita JP 102-0073 in the IEEE OUI registry entry for 38:97:A4. This is the address the organization registered with the IEEE, which may differ from its current operating address.

How many MAC prefixes does ELECOM CO.,LTD. own?

ELECOM CO.,LTD. holds 3 OUI prefixes in the IEEE registry, of which 38:97:A4 is one. A device made by ELECOM CO.,LTD. could carry a MAC address from any of them.

ELECOM CO.,LTD.

MAC address prefix 38:97:A4 is registered to ELECOM CO.,LTD. in the IEEE OUI registry. Any device whose MAC address begins with 38:97:A4 has a network interface built by ELECOM 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 38:97:A4:00:00:00 to 38:97:A4:FF:FF:FF.

OUI prefix: 38:97:A4
Hyphen form: 38-97-A4
MAC range: 38:97:A4:00:00:00 – 38:97:A4:FF:FF:FF
Addresses in block: 16,777,216
Organization: ELECOM CO.,LTD.
Address: 2F Kudan First Place Bldg. 4-1-28 Chiyoda-ku Kudan Kita JP 102-0073
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.

Other prefixes from ELECOM CO.,LTD.

ELECOM CO.,LTD. holds 3 OUI prefixes in total. A device with this exact prefix could just as well carry any of these:

Assignment history (2)

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

2020-08-05Assigned to "ELECOM CO.,LTD."
archived source →
2026-07-17Assigned to "ELECOM CO.,LTD."

Nearby in the registry

The prefixes assigned immediately before and after 38:97:A4:

FAQ

Which company owns MAC address prefix 38:97:A4?: MAC address prefix 38:97:A4 is registered to ELECOM CO.,LTD. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 38:97:A4 has a network interface built by ELECOM CO.,LTD..
What is the OUI 38:97:A4?: 38:97:A4 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to ELECOM CO.,LTD.. It covers every address from 38:97:A4:00:00:00 to 38:97:A4:FF:FF:FF, or 16,777,216 addresses in total. It is also written 38-97-A4.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 38:97:A4:00:00:00 that is 38:97:A4 — 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 ELECOM CO.,LTD. located?: ELECOM CO.,LTD. is listed at 2F Kudan First Place Bldg. 4-1-28 Chiyoda-ku Kudan Kita JP 102-0073 in the IEEE OUI registry entry for 38:97:A4. This is the address the organization registered with the IEEE, which may differ from its current operating address.
How many MAC prefixes does ELECOM CO.,LTD. own?: ELECOM CO.,LTD. holds 3 OUI prefixes in the IEEE registry, of which 38:97:A4 is one. A device made by ELECOM CO.,LTD. could carry a MAC address from any of them.