Which company owns MAC address prefix 94:51:BF?

MAC address prefix 94:51:BF is registered to Hyundai ESG in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 94:51:BF has a network interface built by Hyundai ESG.

What is the OUI 94:51:BF?

94:51:BF is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Hyundai ESG. It covers every address from 94:51:BF:00:00:00 to 94:51:BF:FF:FF:FF, or 16,777,216 addresses in total. It is also written 94-51-BF.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 94:51:BF:00:00:00 that is 94:51:BF — 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 Hyundai ESG located?

Hyundai ESG is listed at Gangnam-gu Seoul KOREA, REPUBLIC OF KR 135-845 in the IEEE OUI registry entry for 94:51:BF. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Hyundai ESG

MAC address prefix 94:51:BF is registered to Hyundai ESG in the IEEE OUI registry. Any device whose MAC address begins with 94:51:BF has a network interface built by Hyundai ESG. 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 94:51:BF:00:00:00 to 94:51:BF:FF:FF:FF.

OUI prefix: 94:51:BF
Hyphen form: 94-51-BF
MAC range: 94:51:BF:00:00:00 – 94:51:BF:FF:FF:FF
Addresses in block: 16,777,216
Organization: Hyundai ESG
Address: Gangnam-gu Seoul KOREA, REPUBLIC OF KR 135-845
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.

2016-07-29Assigned to "Hyundai ESG"
archived source →
2026-07-17Assigned to "Hyundai ESG"

Nearby in the registry

The prefixes assigned immediately before and after 94:51:BF:

FAQ

Which company owns MAC address prefix 94:51:BF?: MAC address prefix 94:51:BF is registered to Hyundai ESG in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 94:51:BF has a network interface built by Hyundai ESG.
What is the OUI 94:51:BF?: 94:51:BF is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Hyundai ESG. It covers every address from 94:51:BF:00:00:00 to 94:51:BF:FF:FF:FF, or 16,777,216 addresses in total. It is also written 94-51-BF.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 94:51:BF:00:00:00 that is 94:51:BF — 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 Hyundai ESG located?: Hyundai ESG is listed at Gangnam-gu Seoul KOREA, REPUBLIC OF KR 135-845 in the IEEE OUI registry entry for 94:51:BF. This is the address the organization registered with the IEEE, which may differ from its current operating address.