Which company owns MAC address prefix 28:A1:EB?

MAC address prefix 28:A1:EB is registered to ETEK TECHNOLOGY (SHENZHEN) CO.,LTD in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 28:A1:EB has a network interface built by ETEK TECHNOLOGY (SHENZHEN) CO.,LTD.

What is the OUI 28:A1:EB?

28:A1:EB is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to ETEK TECHNOLOGY (SHENZHEN) CO.,LTD. It covers every address from 28:A1:EB:00:00:00 to 28:A1:EB:FF:FF:FF, or 16,777,216 addresses in total. It is also written 28-A1-EB.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 28:A1:EB:00:00:00 that is 28:A1:EB — 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 ETEK TECHNOLOGY (SHENZHEN) CO.,LTD located?

ETEK TECHNOLOGY (SHENZHEN) CO.,LTD is listed at A505-506、A509 Room,A5 Floor, Academy Of International Technology Innovation, Keji Nan 10th Road, Hi-Tech Industrial Park, Shenzhen, P.R.C. SHENZHEN GUANGDONG CN 518057 in the IEEE OUI registry entry for 28:A1:EB. This is the address the organization registered with the IEEE, which may differ from its current operating address.

ETEK TECHNOLOGY (SHENZHEN) CO.,LTD

MAC address prefix 28:A1:EB is registered to ETEK TECHNOLOGY (SHENZHEN) CO.,LTD in the IEEE OUI registry. Any device whose MAC address begins with 28:A1:EB has a network interface built by ETEK TECHNOLOGY (SHENZHEN) 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 28:A1:EB:00:00:00 to 28:A1:EB:FF:FF:FF.

OUI prefix: 28:A1:EB
Hyphen form: 28-A1-EB
MAC range: 28:A1:EB:00:00:00 – 28:A1:EB:FF:FF:FF
Addresses in block: 16,777,216
Organization: ETEK TECHNOLOGY (SHENZHEN) CO.,LTD
Address: A505-506、A509 Room,A5 Floor, Academy Of International Technology Innovation, Keji Nan 10th Road, Hi-Tech Industrial Park, Shenzhen, P.R.C. SHENZHEN GUANGDONG CN 518057
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 "ETEK TECHNOLOGY (SHENZHEN) CO.,LTD"
archived source →
2026-07-17Assigned to "ETEK TECHNOLOGY (SHENZHEN) CO.,LTD"

Nearby in the registry

The prefixes assigned immediately before and after 28:A1:EB:

FAQ

Which company owns MAC address prefix 28:A1:EB?: MAC address prefix 28:A1:EB is registered to ETEK TECHNOLOGY (SHENZHEN) CO.,LTD in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 28:A1:EB has a network interface built by ETEK TECHNOLOGY (SHENZHEN) CO.,LTD.
What is the OUI 28:A1:EB?: 28:A1:EB is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to ETEK TECHNOLOGY (SHENZHEN) CO.,LTD. It covers every address from 28:A1:EB:00:00:00 to 28:A1:EB:FF:FF:FF, or 16,777,216 addresses in total. It is also written 28-A1-EB.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 28:A1:EB:00:00:00 that is 28:A1:EB — 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 ETEK TECHNOLOGY (SHENZHEN) CO.,LTD located?: ETEK TECHNOLOGY (SHENZHEN) CO.,LTD is listed at A505-506、A509 Room,A5 Floor, Academy Of International Technology Innovation, Keji Nan 10th Road, Hi-Tech Industrial Park, Shenzhen, P.R.C. SHENZHEN GUANGDONG CN 518057 in the IEEE OUI registry entry for 28:A1:EB. This is the address the organization registered with the IEEE, which may differ from its current operating address.