Which company owns MAC address prefix 08:37:9C?

MAC address prefix 08:37:9C is registered to Topaz Co. LTD. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 08:37:9C has a network interface built by Topaz Co. LTD..

What is the OUI 08:37:9C?

08:37:9C is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Topaz Co. LTD.. It covers every address from 08:37:9C:00:00:00 to 08:37:9C:FF:FF:FF, or 16,777,216 addresses in total. It is also written 08-37-9C.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 08:37:9C:00:00:00 that is 08:37:9C — 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 Topaz Co. LTD. located?

Topaz Co. LTD. is listed at B305-22, Acrotower, 1591 Gwanyang-dong Anyang-si Gyeonggi-Do KR 431-060 in the IEEE OUI registry entry for 08:37:9C. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Topaz Co. LTD.

MAC address prefix 08:37:9C is registered to Topaz Co. LTD. in the IEEE OUI registry. Any device whose MAC address begins with 08:37:9C has a network interface built by Topaz 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 08:37:9C:00:00:00 to 08:37:9C:FF:FF:FF.

OUI prefix: 08:37:9C
Hyphen form: 08-37-9C
MAC range: 08:37:9C:00:00:00 – 08:37:9C:FF:FF:FF
Addresses in block: 16,777,216
Organization: Topaz Co. LTD.
Address: B305-22, Acrotower, 1591 Gwanyang-dong Anyang-si Gyeonggi-Do KR 431-060
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 "Topaz Co. LTD."
archived source →
2026-07-17Assigned to "Topaz Co. LTD."

Nearby in the registry

The prefixes assigned immediately before and after 08:37:9C:

FAQ

Which company owns MAC address prefix 08:37:9C?: MAC address prefix 08:37:9C is registered to Topaz Co. LTD. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 08:37:9C has a network interface built by Topaz Co. LTD..
What is the OUI 08:37:9C?: 08:37:9C is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Topaz Co. LTD.. It covers every address from 08:37:9C:00:00:00 to 08:37:9C:FF:FF:FF, or 16,777,216 addresses in total. It is also written 08-37-9C.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 08:37:9C:00:00:00 that is 08:37:9C — 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 Topaz Co. LTD. located?: Topaz Co. LTD. is listed at B305-22, Acrotower, 1591 Gwanyang-dong Anyang-si Gyeonggi-Do KR 431-060 in the IEEE OUI registry entry for 08:37:9C. This is the address the organization registered with the IEEE, which may differ from its current operating address.