Which company owns MAC address prefix 28:E7:94?

MAC address prefix 28:E7:94 is registered to Microtime Computer Inc. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 28:E7:94 has a network interface built by Microtime Computer Inc..

What is the OUI 28:E7:94?

28:E7:94 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Microtime Computer Inc.. It covers every address from 28:E7:94:00:00:00 to 28:E7:94:FF:FF:FF, or 16,777,216 addresses in total. It is also written 28-E7-94.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 28:E7:94:00:00:00 that is 28:E7:94 — 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 Microtime Computer Inc. located?

Microtime Computer Inc. is listed at 4F, No. 222, Sec. 4, Cheng-Teh Rd., Taipei TW 11167 in the IEEE OUI registry entry for 28:E7:94. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Microtime Computer Inc.

MAC address prefix 28:E7:94 is registered to Microtime Computer Inc. in the IEEE OUI registry. Any device whose MAC address begins with 28:E7:94 has a network interface built by Microtime Computer 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 28:E7:94:00:00:00 to 28:E7:94:FF:FF:FF.

OUI prefix: 28:E7:94
Hyphen form: 28-E7-94
MAC range: 28:E7:94:00:00:00 – 28:E7:94:FF:FF:FF
Addresses in block: 16,777,216
Organization: Microtime Computer Inc.
Address: 4F, No. 222, Sec. 4, Cheng-Teh Rd., Taipei TW 11167
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 "Microtime Computer Inc."
archived source →
2026-07-17Assigned to "Microtime Computer Inc."

Nearby in the registry

The prefixes assigned immediately before and after 28:E7:94:

FAQ

Which company owns MAC address prefix 28:E7:94?: MAC address prefix 28:E7:94 is registered to Microtime Computer Inc. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 28:E7:94 has a network interface built by Microtime Computer Inc..
What is the OUI 28:E7:94?: 28:E7:94 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Microtime Computer Inc.. It covers every address from 28:E7:94:00:00:00 to 28:E7:94:FF:FF:FF, or 16,777,216 addresses in total. It is also written 28-E7-94.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 28:E7:94:00:00:00 that is 28:E7:94 — 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 Microtime Computer Inc. located?: Microtime Computer Inc. is listed at 4F, No. 222, Sec. 4, Cheng-Teh Rd., Taipei TW 11167 in the IEEE OUI registry entry for 28:E7:94. This is the address the organization registered with the IEEE, which may differ from its current operating address.