Which company owns MAC address prefix B8:57:76?

MAC address prefix B8:57:76 is registered to lignex1 in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with B8:57:76 has a network interface built by lignex1.

What is the OUI B8:57:76?

B8:57:76 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to lignex1. It covers every address from B8:57:76:00:00:00 to B8:57:76:FF:FF:FF, or 16,777,216 addresses in total. It is also written B8-57-76.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in B8:57:76:00:00:00 that is B8:57:76 — 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 lignex1 located?

lignex1 is listed at 354-25, Sanhodae-ro Gumi-si Gyeongsangbuk-do, Korea KR 39262 in the IEEE OUI registry entry for B8:57:76. This is the address the organization registered with the IEEE, which may differ from its current operating address.

lignex1

MAC address prefix B8:57:76 is registered to lignex1 in the IEEE OUI registry. Any device whose MAC address begins with B8:57:76 has a network interface built by lignex1. 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 B8:57:76:00:00:00 to B8:57:76:FF:FF:FF.

OUI prefix: B8:57:76
Hyphen form: B8-57-76
MAC range: B8:57:76:00:00:00 – B8:57:76:FF:FF:FF
Addresses in block: 16,777,216
Organization: lignex1
Address: 354-25, Sanhodae-ro Gumi-si Gyeongsangbuk-do, Korea KR 39262
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.

2020-04-23Assigned to "lignex1"
archived source →
2026-07-17Assigned to "lignex1"

Nearby in the registry

The prefixes assigned immediately before and after B8:57:76:

FAQ

Which company owns MAC address prefix B8:57:76?: MAC address prefix B8:57:76 is registered to lignex1 in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with B8:57:76 has a network interface built by lignex1.
What is the OUI B8:57:76?: B8:57:76 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to lignex1. It covers every address from B8:57:76:00:00:00 to B8:57:76:FF:FF:FF, or 16,777,216 addresses in total. It is also written B8-57-76.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in B8:57:76:00:00:00 that is B8:57:76 — 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 lignex1 located?: lignex1 is listed at 354-25, Sanhodae-ro Gumi-si Gyeongsangbuk-do, Korea KR 39262 in the IEEE OUI registry entry for B8:57:76. This is the address the organization registered with the IEEE, which may differ from its current operating address.