Which company owns MAC address prefix 5C:CC:A0?

MAC address prefix 5C:CC:A0 is registered to Gridwiz Inc. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 5C:CC:A0 has a network interface built by Gridwiz Inc..

What is the OUI 5C:CC:A0?

5C:CC:A0 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Gridwiz Inc.. It covers every address from 5C:CC:A0:00:00:00 to 5C:CC:A0:FF:FF:FF, or 16,777,216 addresses in total. It is also written 5C-CC-A0.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 5C:CC:A0:00:00:00 that is 5C:CC:A0 — 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 Gridwiz Inc. located?

Gridwiz Inc. is listed at 4F, 25 Sanun-ro 208beon-gil, Bundang-gu Seongnam Gyeonggi KR 13460 in the IEEE OUI registry entry for 5C:CC:A0. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Gridwiz Inc.

MAC address prefix 5C:CC:A0 is registered to Gridwiz Inc. in the IEEE OUI registry. Any device whose MAC address begins with 5C:CC:A0 has a network interface built by Gridwiz 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 5C:CC:A0:00:00:00 to 5C:CC:A0:FF:FF:FF.

OUI prefix: 5C:CC:A0
Hyphen form: 5C-CC-A0
MAC range: 5C:CC:A0:00:00:00 – 5C:CC:A0:FF:FF:FF
Addresses in block: 16,777,216
Organization: Gridwiz Inc.
Address: 4F, 25 Sanun-ro 208beon-gil, Bundang-gu Seongnam Gyeonggi KR 13460
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.

2017-09-08Assigned to "Gridwiz Inc."
archived source →
2026-07-17Assigned to "Gridwiz Inc."

Nearby in the registry

The prefixes assigned immediately before and after 5C:CC:A0:

FAQ

Which company owns MAC address prefix 5C:CC:A0?: MAC address prefix 5C:CC:A0 is registered to Gridwiz Inc. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 5C:CC:A0 has a network interface built by Gridwiz Inc..
What is the OUI 5C:CC:A0?: 5C:CC:A0 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Gridwiz Inc.. It covers every address from 5C:CC:A0:00:00:00 to 5C:CC:A0:FF:FF:FF, or 16,777,216 addresses in total. It is also written 5C-CC-A0.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 5C:CC:A0:00:00:00 that is 5C:CC:A0 — 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 Gridwiz Inc. located?: Gridwiz Inc. is listed at 4F, 25 Sanun-ro 208beon-gil, Bundang-gu Seongnam Gyeonggi KR 13460 in the IEEE OUI registry entry for 5C:CC:A0. This is the address the organization registered with the IEEE, which may differ from its current operating address.