Which company owns MAC address prefix 9C:9A:C0?

MAC address prefix 9C:9A:C0 is registered to LEGO System A/S in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 9C:9A:C0 has a network interface built by LEGO System A/S.

What is the OUI 9C:9A:C0?

9C:9A:C0 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to LEGO System A/S. It covers every address from 9C:9A:C0:00:00:00 to 9C:9A:C0:FF:FF:FF, or 16,777,216 addresses in total. It is also written 9C-9A-C0.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 9C:9A:C0:00:00:00 that is 9C:9A:C0 — 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 LEGO System A/S located?

LEGO System A/S is listed at Aastvej 1 Billund DK DK-7190 in the IEEE OUI registry entry for 9C:9A:C0. This is the address the organization registered with the IEEE, which may differ from its current operating address.

How many MAC prefixes does LEGO System A/S own?

LEGO System A/S holds 2 OUI prefixes in the IEEE registry, of which 9C:9A:C0 is one. A device made by LEGO System A/S could carry a MAC address from any of them.

LEGO System A/S

MAC address prefix 9C:9A:C0 is registered to LEGO System A/S in the IEEE OUI registry. Any device whose MAC address begins with 9C:9A:C0 has a network interface built by LEGO System A/S. 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 9C:9A:C0:00:00:00 to 9C:9A:C0:FF:FF:FF.

OUI prefix: 9C:9A:C0
Hyphen form: 9C-9A-C0
MAC range: 9C:9A:C0:00:00:00 – 9C:9A:C0:FF:FF:FF
Addresses in block: 16,777,216
Organization: LEGO System A/S
Address: Aastvej 1 Billund DK DK-7190
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 LEGO System A/S

LEGO System A/S holds 2 OUI prefixes in total. A device with this exact prefix could just as well carry any of these:

90:84:2B

Assignment history (2)

The IEEE registry publishes current state only — this is the change record we've kept since we started tracking it daily.

2020-11-28Assigned to "LEGO System A/S"
archived source →
2026-07-17Assigned to "LEGO System A/S"

Nearby in the registry

The prefixes assigned immediately before and after 9C:9A:C0:

FAQ

Which company owns MAC address prefix 9C:9A:C0?: MAC address prefix 9C:9A:C0 is registered to LEGO System A/S in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 9C:9A:C0 has a network interface built by LEGO System A/S.
What is the OUI 9C:9A:C0?: 9C:9A:C0 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to LEGO System A/S. It covers every address from 9C:9A:C0:00:00:00 to 9C:9A:C0:FF:FF:FF, or 16,777,216 addresses in total. It is also written 9C-9A-C0.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 9C:9A:C0:00:00:00 that is 9C:9A:C0 — 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 LEGO System A/S located?: LEGO System A/S is listed at Aastvej 1 Billund DK DK-7190 in the IEEE OUI registry entry for 9C:9A:C0. This is the address the organization registered with the IEEE, which may differ from its current operating address.
How many MAC prefixes does LEGO System A/S own?: LEGO System A/S holds 2 OUI prefixes in the IEEE registry, of which 9C:9A:C0 is one. A device made by LEGO System A/S could carry a MAC address from any of them.