Which company owns MAC address prefix A8:BC:9C?

MAC address prefix A8:BC:9C is registered to Cloud Light Technology Limited in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with A8:BC:9C has a network interface built by Cloud Light Technology Limited.

What is the OUI A8:BC:9C?

A8:BC:9C is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Cloud Light Technology Limited. It covers every address from A8:BC:9C:00:00:00 to A8:BC:9C:FF:FF:FF, or 16,777,216 addresses in total. It is also written A8-BC-9C.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in A8:BC:9C:00:00:00 that is A8:BC: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 Cloud Light Technology Limited located?

Cloud Light Technology Limited is listed at 3/F, 6 Science Park East Avenue Hong Kong Science Park Shatin, N.T., Hong Kong Hong Kong HK 00000 in the IEEE OUI registry entry for A8:BC:9C. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Cloud Light Technology Limited

MAC address prefix A8:BC:9C is registered to Cloud Light Technology Limited in the IEEE OUI registry. Any device whose MAC address begins with A8:BC:9C has a network interface built by Cloud Light Technology Limited. 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 A8:BC:9C:00:00:00 to A8:BC:9C:FF:FF:FF.

OUI prefix: A8:BC:9C
Hyphen form: A8-BC-9C
MAC range: A8:BC:9C:00:00:00 – A8:BC:9C:FF:FF:FF
Addresses in block: 16,777,216
Organization: Cloud Light Technology Limited
Address: 3/F, 6 Science Park East Avenue Hong Kong Science Park Shatin, N.T., Hong Kong Hong Kong HK 00000
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.

2018-12-21Assigned to "Cloud Light Technology Limited"
archived source →
2026-07-17Assigned to "Cloud Light Technology Limited"

Nearby in the registry

The prefixes assigned immediately before and after A8:BC:9C:

FAQ

Which company owns MAC address prefix A8:BC:9C?: MAC address prefix A8:BC:9C is registered to Cloud Light Technology Limited in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with A8:BC:9C has a network interface built by Cloud Light Technology Limited.
What is the OUI A8:BC:9C?: A8:BC:9C is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Cloud Light Technology Limited. It covers every address from A8:BC:9C:00:00:00 to A8:BC:9C:FF:FF:FF, or 16,777,216 addresses in total. It is also written A8-BC-9C.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in A8:BC:9C:00:00:00 that is A8:BC: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 Cloud Light Technology Limited located?: Cloud Light Technology Limited is listed at 3/F, 6 Science Park East Avenue Hong Kong Science Park Shatin, N.T., Hong Kong Hong Kong HK 00000 in the IEEE OUI registry entry for A8:BC:9C. This is the address the organization registered with the IEEE, which may differ from its current operating address.