Which company owns MAC address prefix E8:1B:4B?

MAC address prefix E8:1B:4B is registered to amnimo Inc. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with E8:1B:4B has a network interface built by amnimo Inc..

What is the OUI E8:1B:4B?

E8:1B:4B is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to amnimo Inc.. It covers every address from E8:1B:4B:00:00:00 to E8:1B:4B:FF:FF:FF, or 16,777,216 addresses in total. It is also written E8-1B-4B.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in E8:1B:4B:00:00:00 that is E8:1B:4B — 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 amnimo Inc. located?

amnimo Inc. is listed at M21-4, 2-9-32 Nakacho Musashino-shi Tokyo JP 180-8750 in the IEEE OUI registry entry for E8:1B:4B. This is the address the organization registered with the IEEE, which may differ from its current operating address.

amnimo Inc.

MAC address prefix E8:1B:4B is registered to amnimo Inc. in the IEEE OUI registry. Any device whose MAC address begins with E8:1B:4B has a network interface built by amnimo 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 E8:1B:4B:00:00:00 to E8:1B:4B:FF:FF:FF.

OUI prefix: E8:1B:4B
Hyphen form: E8-1B-4B
MAC range: E8:1B:4B:00:00:00 – E8:1B:4B:FF:FF:FF
Addresses in block: 16,777,216
Organization: amnimo Inc.
Address: M21-4, 2-9-32 Nakacho Musashino-shi Tokyo JP 180-8750
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.

2020-03-21Assigned to "amnimo Inc."
archived source →
2026-07-17Assigned to "amnimo Inc."

Nearby in the registry

The prefixes assigned immediately before and after E8:1B:4B:

FAQ

Which company owns MAC address prefix E8:1B:4B?: MAC address prefix E8:1B:4B is registered to amnimo Inc. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with E8:1B:4B has a network interface built by amnimo Inc..
What is the OUI E8:1B:4B?: E8:1B:4B is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to amnimo Inc.. It covers every address from E8:1B:4B:00:00:00 to E8:1B:4B:FF:FF:FF, or 16,777,216 addresses in total. It is also written E8-1B-4B.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in E8:1B:4B:00:00:00 that is E8:1B:4B — 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 amnimo Inc. located?: amnimo Inc. is listed at M21-4, 2-9-32 Nakacho Musashino-shi Tokyo JP 180-8750 in the IEEE OUI registry entry for E8:1B:4B. This is the address the organization registered with the IEEE, which may differ from its current operating address.