Which company owns MAC address prefix 44:2A:FF?

MAC address prefix 44:2A:FF is registered to E3 Technology, Inc. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 44:2A:FF has a network interface built by E3 Technology, Inc..

What is the OUI 44:2A:FF?

44:2A:FF is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to E3 Technology, Inc.. It covers every address from 44:2A:FF:00:00:00 to 44:2A:FF:FF:FF:FF, or 16,777,216 addresses in total. It is also written 44-2A-FF.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 44:2A:FF:00:00:00 that is 44:2A:FF — 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 E3 Technology, Inc. located?

E3 Technology, Inc. is listed at Martell-house 2F, 2-28-3 Sekimachi-Kita, Nerima-ku Tokyo JP 177-0051 in the IEEE OUI registry entry for 44:2A:FF. This is the address the organization registered with the IEEE, which may differ from its current operating address.

E3 Technology, Inc.

MAC address prefix 44:2A:FF is registered to E3 Technology, Inc. in the IEEE OUI registry. Any device whose MAC address begins with 44:2A:FF has a network interface built by E3 Technology, 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 44:2A:FF:00:00:00 to 44:2A:FF:FF:FF:FF.

OUI prefix: 44:2A:FF
Hyphen form: 44-2A-FF
MAC range: 44:2A:FF:00:00:00 – 44:2A:FF:FF:FF:FF
Addresses in block: 16,777,216
Organization: E3 Technology, Inc.
Address: Martell-house 2F, 2-28-3 Sekimachi-Kita, Nerima-ku Tokyo JP 177-0051
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 "E3 Technology, Inc."
archived source →
2026-07-17Assigned to "E3 Technology, Inc."

Nearby in the registry

The prefixes assigned immediately before and after 44:2A:FF:

FAQ

Which company owns MAC address prefix 44:2A:FF?: MAC address prefix 44:2A:FF is registered to E3 Technology, Inc. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 44:2A:FF has a network interface built by E3 Technology, Inc..
What is the OUI 44:2A:FF?: 44:2A:FF is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to E3 Technology, Inc.. It covers every address from 44:2A:FF:00:00:00 to 44:2A:FF:FF:FF:FF, or 16,777,216 addresses in total. It is also written 44-2A-FF.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 44:2A:FF:00:00:00 that is 44:2A:FF — 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 E3 Technology, Inc. located?: E3 Technology, Inc. is listed at Martell-house 2F, 2-28-3 Sekimachi-Kita, Nerima-ku Tokyo JP 177-0051 in the IEEE OUI registry entry for 44:2A:FF. This is the address the organization registered with the IEEE, which may differ from its current operating address.