Which company owns MAC address prefix 04:AA:E1?

MAC address prefix 04:AA:E1 is registered to BEIJING MICROVISION TECHNOLOGY CO.,LTD in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 04:AA:E1 has a network interface built by BEIJING MICROVISION TECHNOLOGY CO.,LTD.

What is the OUI 04:AA:E1?

04:AA:E1 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to BEIJING MICROVISION TECHNOLOGY CO.,LTD. It covers every address from 04:AA:E1:00:00:00 to 04:AA:E1:FF:FF:FF, or 16,777,216 addresses in total. It is also written 04-AA-E1.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 04:AA:E1:00:00:00 that is 04:AA:E1 — 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 BEIJING MICROVISION TECHNOLOGY CO.,LTD located?

BEIJING MICROVISION TECHNOLOGY CO.,LTD is listed at ROOM 207-208,2/F,TAIXIANG COMMERCIAL BUILDING,NO.1A,LONGXIANG ROAD,HAIDIAN DISTRICT,BEIJING,P.R.C BEIJING BEIJING CN 100191 in the IEEE OUI registry entry for 04:AA:E1. This is the address the organization registered with the IEEE, which may differ from its current operating address.

BEIJING MICROVISION TECHNOLOGY CO.,LTD

MAC address prefix 04:AA:E1 is registered to BEIJING MICROVISION TECHNOLOGY CO.,LTD in the IEEE OUI registry. Any device whose MAC address begins with 04:AA:E1 has a network interface built by BEIJING MICROVISION TECHNOLOGY 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 04:AA:E1:00:00:00 to 04:AA:E1:FF:FF:FF.

OUI prefix: 04:AA:E1
Hyphen form: 04-AA-E1
MAC range: 04:AA:E1:00:00:00 – 04:AA:E1:FF:FF:FF
Addresses in block: 16,777,216
Organization: BEIJING MICROVISION TECHNOLOGY CO.,LTD
Address: ROOM 207-208,2/F,TAIXIANG COMMERCIAL BUILDING,NO.1A,LONGXIANG ROAD,HAIDIAN DISTRICT,BEIJING,P.R.C BEIJING BEIJING CN 100191
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 "BEIJING MICROVISION TECHNOLOGY CO.,LTD"
archived source →
2026-07-17Assigned to "BEIJING MICROVISION TECHNOLOGY CO.,LTD"

Nearby in the registry

The prefixes assigned immediately before and after 04:AA:E1:

FAQ

Which company owns MAC address prefix 04:AA:E1?: MAC address prefix 04:AA:E1 is registered to BEIJING MICROVISION TECHNOLOGY CO.,LTD in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 04:AA:E1 has a network interface built by BEIJING MICROVISION TECHNOLOGY CO.,LTD.
What is the OUI 04:AA:E1?: 04:AA:E1 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to BEIJING MICROVISION TECHNOLOGY CO.,LTD. It covers every address from 04:AA:E1:00:00:00 to 04:AA:E1:FF:FF:FF, or 16,777,216 addresses in total. It is also written 04-AA-E1.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 04:AA:E1:00:00:00 that is 04:AA:E1 — 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 BEIJING MICROVISION TECHNOLOGY CO.,LTD located?: BEIJING MICROVISION TECHNOLOGY CO.,LTD is listed at ROOM 207-208,2/F,TAIXIANG COMMERCIAL BUILDING,NO.1A,LONGXIANG ROAD,HAIDIAN DISTRICT,BEIJING,P.R.C BEIJING BEIJING CN 100191 in the IEEE OUI registry entry for 04:AA:E1. This is the address the organization registered with the IEEE, which may differ from its current operating address.