Which company owns MAC address prefix 40:61:8E?

MAC address prefix 40:61:8E is registered to Stella-Green Co in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 40:61:8E has a network interface built by Stella-Green Co.

What is the OUI 40:61:8E?

40:61:8E is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Stella-Green Co. It covers every address from 40:61:8E:00:00:00 to 40:61:8E:FF:FF:FF, or 16,777,216 addresses in total. It is also written 40-61-8E.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 40:61:8E:00:00:00 that is 40:61:8E — 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 Stella-Green Co located?

Stella-Green Co is listed at 1-5-16 Edobori, Nishi-ku Osaka JP 550-0002 in the IEEE OUI registry entry for 40:61:8E. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Stella-Green Co

MAC address prefix 40:61:8E is registered to Stella-Green Co in the IEEE OUI registry. Any device whose MAC address begins with 40:61:8E has a network interface built by Stella-Green Co. 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 40:61:8E:00:00:00 to 40:61:8E:FF:FF:FF.

OUI prefix: 40:61:8E
Hyphen form: 40-61-8E
MAC range: 40:61:8E:00:00:00 – 40:61:8E:FF:FF:FF
Addresses in block: 16,777,216
Organization: Stella-Green Co
Address: 1-5-16 Edobori, Nishi-ku Osaka JP 550-0002
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 "Stella-Green Co"
archived source →
2026-07-17Assigned to "Stella-Green Co"

Nearby in the registry

The prefixes assigned immediately before and after 40:61:8E:

FAQ

Which company owns MAC address prefix 40:61:8E?: MAC address prefix 40:61:8E is registered to Stella-Green Co in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 40:61:8E has a network interface built by Stella-Green Co.
What is the OUI 40:61:8E?: 40:61:8E is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Stella-Green Co. It covers every address from 40:61:8E:00:00:00 to 40:61:8E:FF:FF:FF, or 16,777,216 addresses in total. It is also written 40-61-8E.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 40:61:8E:00:00:00 that is 40:61:8E — 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 Stella-Green Co located?: Stella-Green Co is listed at 1-5-16 Edobori, Nishi-ku Osaka JP 550-0002 in the IEEE OUI registry entry for 40:61:8E. This is the address the organization registered with the IEEE, which may differ from its current operating address.