Which company owns MAC address prefix 04:6B:1B?

MAC address prefix 04:6B:1B is registered to SYSDINE Co., Ltd. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 04:6B:1B has a network interface built by SYSDINE Co., Ltd..

What is the OUI 04:6B:1B?

04:6B:1B is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to SYSDINE Co., Ltd.. It covers every address from 04:6B:1B:00:00:00 to 04:6B:1B:FF:FF:FF, or 16,777,216 addresses in total. It is also written 04-6B-1B.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 04:6B:1B:00:00:00 that is 04:6B:1B — 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 SYSDINE Co., Ltd. located?

SYSDINE Co., Ltd. is listed at 506 Convergence technology research commercialization center 218 Gajung-Ro, Yuseong-gu Daejeon-City Daejeon-City KR 34129 in the IEEE OUI registry entry for 04:6B:1B. This is the address the organization registered with the IEEE, which may differ from its current operating address.

SYSDINE Co., Ltd.

MAC address prefix 04:6B:1B is registered to SYSDINE Co., Ltd. in the IEEE OUI registry. Any device whose MAC address begins with 04:6B:1B has a network interface built by SYSDINE 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 04:6B:1B:00:00:00 to 04:6B:1B:FF:FF:FF.

OUI prefix: 04:6B:1B
Hyphen form: 04-6B-1B
MAC range: 04:6B:1B:00:00:00 – 04:6B:1B:FF:FF:FF
Addresses in block: 16,777,216
Organization: SYSDINE Co., Ltd.
Address: 506 Convergence technology research commercialization center 218 Gajung-Ro, Yuseong-gu Daejeon-City Daejeon-City KR 34129
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 "SYSDINE Co., Ltd."
archived source →
2026-07-17Assigned to "SYSDINE Co., Ltd."

Nearby in the registry

The prefixes assigned immediately before and after 04:6B:1B:

FAQ

Which company owns MAC address prefix 04:6B:1B?: MAC address prefix 04:6B:1B is registered to SYSDINE Co., Ltd. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 04:6B:1B has a network interface built by SYSDINE Co., Ltd..
What is the OUI 04:6B:1B?: 04:6B:1B is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to SYSDINE Co., Ltd.. It covers every address from 04:6B:1B:00:00:00 to 04:6B:1B:FF:FF:FF, or 16,777,216 addresses in total. It is also written 04-6B-1B.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 04:6B:1B:00:00:00 that is 04:6B:1B — 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 SYSDINE Co., Ltd. located?: SYSDINE Co., Ltd. is listed at 506 Convergence technology research commercialization center 218 Gajung-Ro, Yuseong-gu Daejeon-City Daejeon-City KR 34129 in the IEEE OUI registry entry for 04:6B:1B. This is the address the organization registered with the IEEE, which may differ from its current operating address.