Which company owns MAC address prefix 8C:89:A5?

MAC address prefix 8C:89:A5 is registered to Micro-Star INT'L CO., LTD in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 8C:89:A5 has a network interface built by Micro-Star INT'L CO., LTD.

What is the OUI 8C:89:A5?

8C:89:A5 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Micro-Star INT'L CO., LTD. It covers every address from 8C:89:A5:00:00:00 to 8C:89:A5:FF:FF:FF, or 16,777,216 addresses in total. It is also written 8C-89-A5.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 8C:89:A5:00:00:00 that is 8C:89:A5 — 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 Micro-Star INT'L CO., LTD located?

Micro-Star INT'L CO., LTD is listed at No.69, Lide st. Taipei County TW 235 in the IEEE OUI registry entry for 8C:89:A5. This is the address the organization registered with the IEEE, which may differ from its current operating address.

How many MAC prefixes does Micro-Star INT'L CO., LTD own?

Micro-Star INT'L CO., LTD holds 2 OUI prefixes in the IEEE registry, of which 8C:89:A5 is one. A device made by Micro-Star INT'L CO., LTD could carry a MAC address from any of them.

Micro-Star INT'L CO., LTD

MAC address prefix 8C:89:A5 is registered to Micro-Star INT'L CO., LTD in the IEEE OUI registry. Any device whose MAC address begins with 8C:89:A5 has a network interface built by Micro-Star INT'L 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 8C:89:A5:00:00:00 to 8C:89:A5:FF:FF:FF.

OUI prefix: 8C:89:A5
Hyphen form: 8C-89-A5
MAC range: 8C:89:A5:00:00:00 – 8C:89:A5:FF:FF:FF
Addresses in block: 16,777,216
Organization: Micro-Star INT'L CO., LTD
Address: No.69, Lide st. Taipei County TW 235
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.

Other prefixes from Micro-Star INT'L CO., LTD

Micro-Star INT'L CO., LTD holds 2 OUI prefixes in total. A device with this exact prefix could just as well carry any of these:

6C:62:6D

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 "Micro-Star INT'L CO., LTD"
archived source →
2026-07-17Assigned to "Micro-Star INT'L CO., LTD"

Nearby in the registry

The prefixes assigned immediately before and after 8C:89:A5:

FAQ

Which company owns MAC address prefix 8C:89:A5?: MAC address prefix 8C:89:A5 is registered to Micro-Star INT'L CO., LTD in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 8C:89:A5 has a network interface built by Micro-Star INT'L CO., LTD.
What is the OUI 8C:89:A5?: 8C:89:A5 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Micro-Star INT'L CO., LTD. It covers every address from 8C:89:A5:00:00:00 to 8C:89:A5:FF:FF:FF, or 16,777,216 addresses in total. It is also written 8C-89-A5.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 8C:89:A5:00:00:00 that is 8C:89:A5 — 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 Micro-Star INT'L CO., LTD located?: Micro-Star INT'L CO., LTD is listed at No.69, Lide st. Taipei County TW 235 in the IEEE OUI registry entry for 8C:89:A5. This is the address the organization registered with the IEEE, which may differ from its current operating address.
How many MAC prefixes does Micro-Star INT'L CO., LTD own?: Micro-Star INT'L CO., LTD holds 2 OUI prefixes in the IEEE registry, of which 8C:89:A5 is one. A device made by Micro-Star INT'L CO., LTD could carry a MAC address from any of them.