Which company owns MAC address prefix 94:54:DF?

MAC address prefix 94:54:DF is registered to YST CORP. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 94:54:DF has a network interface built by YST CORP..

What is the OUI 94:54:DF?

94:54:DF is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to YST CORP.. It covers every address from 94:54:DF:00:00:00 to 94:54:DF:FF:FF:FF, or 16,777,216 addresses in total. It is also written 94-54-DF.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 94:54:DF:00:00:00 that is 94:54:DF — 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 YST CORP. located?

YST CORP. is listed at A-1407, 767, Sinsu-ro, Suji-gu, Yongin-si Gyeonggi-do KR 16827 in the IEEE OUI registry entry for 94:54:DF. This is the address the organization registered with the IEEE, which may differ from its current operating address.

YST CORP.

MAC address prefix 94:54:DF is registered to YST CORP. in the IEEE OUI registry. Any device whose MAC address begins with 94:54:DF has a network interface built by YST CORP.. 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 94:54:DF:00:00:00 to 94:54:DF:FF:FF:FF.

OUI prefix: 94:54:DF
Hyphen form: 94-54-DF
MAC range: 94:54:DF:00:00:00 – 94:54:DF:FF:FF:FF
Addresses in block: 16,777,216
Organization: YST CORP.
Address: A-1407, 767, Sinsu-ro, Suji-gu, Yongin-si Gyeonggi-do KR 16827
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 "YST CORP."
archived source →
2026-07-17Assigned to "YST CORP."

Nearby in the registry

The prefixes assigned immediately before and after 94:54:DF:

FAQ

Which company owns MAC address prefix 94:54:DF?: MAC address prefix 94:54:DF is registered to YST CORP. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 94:54:DF has a network interface built by YST CORP..
What is the OUI 94:54:DF?: 94:54:DF is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to YST CORP.. It covers every address from 94:54:DF:00:00:00 to 94:54:DF:FF:FF:FF, or 16,777,216 addresses in total. It is also written 94-54-DF.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 94:54:DF:00:00:00 that is 94:54:DF — 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 YST CORP. located?: YST CORP. is listed at A-1407, 767, Sinsu-ro, Suji-gu, Yongin-si Gyeonggi-do KR 16827 in the IEEE OUI registry entry for 94:54:DF. This is the address the organization registered with the IEEE, which may differ from its current operating address.