Which company owns MAC address prefix 48:04:9F?

MAC address prefix 48:04:9F is registered to ELECOM CO., LTD in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 48:04:9F has a network interface built by ELECOM CO., LTD.

What is the OUI 48:04:9F?

48:04:9F 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 48:04:9F:00:00:00 to 48:04:9F:FF:FF:FF, or 16,777,216 addresses in total. It is also written 48-04-9F.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 48:04:9F:00:00:00 that is 48:04:9F — 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 9FLand Axis Tower.1-1 fushimi machi,4-chome chuoku osaka JP 5418765 in the IEEE OUI registry entry for 48:04:9F. This is the address the organization registered with the IEEE, which may differ from its current operating address.

ELECOM CO., LTD

MAC address prefix 48:04:9F is registered to ELECOM CO., LTD in the IEEE OUI registry. Any device whose MAC address begins with 48:04:9F 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 48:04:9F:00:00:00 to 48:04:9F:FF:FF:FF.

OUI prefix: 48:04:9F
Hyphen form: 48-04-9F
MAC range: 48:04:9F:00:00:00 – 48:04:9F:FF:FF:FF
Addresses in block: 16,777,216
Organization: ELECOM CO., LTD
Address: 9FLand Axis Tower.1-1 fushimi machi,4-chome chuoku osaka JP 5418765
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.

2018-12-21Assigned to "ELECOM CO., LTD"
archived source →
2026-07-17Assigned to "ELECOM CO., LTD"

Nearby in the registry

The prefixes assigned immediately before and after 48:04:9F:

FAQ

Which company owns MAC address prefix 48:04:9F?: MAC address prefix 48:04:9F is registered to ELECOM CO., LTD in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 48:04:9F has a network interface built by ELECOM CO., LTD.
What is the OUI 48:04:9F?: 48:04:9F 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 48:04:9F:00:00:00 to 48:04:9F:FF:FF:FF, or 16,777,216 addresses in total. It is also written 48-04-9F.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 48:04:9F:00:00:00 that is 48:04:9F — 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 9FLand Axis Tower.1-1 fushimi machi,4-chome chuoku osaka JP 5418765 in the IEEE OUI registry entry for 48:04:9F. This is the address the organization registered with the IEEE, which may differ from its current operating address.