Which company owns MAC address prefix AC:E4:2E?

MAC address prefix AC:E4:2E is registered to SK hynix in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with AC:E4:2E has a network interface built by SK hynix.

What is the OUI AC:E4:2E?

AC:E4:2E is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to SK hynix. It covers every address from AC:E4:2E:00:00:00 to AC:E4:2E:FF:FF:FF, or 16,777,216 addresses in total. It is also written AC-E4-2E.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in AC:E4:2E:00:00:00 that is AC:E4:2E — 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 SK hynix located?

SK hynix is listed at SK u-Tower, 25-1, Jeongja-dong, Bundang-gu Seongnam-si Gyeonggi-do KR 463-844 in the IEEE OUI registry entry for AC:E4:2E. This is the address the organization registered with the IEEE, which may differ from its current operating address.

SK hynix

MAC address prefix AC:E4:2E is registered to SK hynix in the IEEE OUI registry. Any device whose MAC address begins with AC:E4:2E has a network interface built by SK hynix. 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 AC:E4:2E:00:00:00 to AC:E4:2E:FF:FF:FF.

OUI prefix: AC:E4:2E
Hyphen form: AC-E4-2E
MAC range: AC:E4:2E:00:00:00 – AC:E4:2E:FF:FF:FF
Addresses in block: 16,777,216
Organization: SK hynix
Address: SK u-Tower, 25-1, Jeongja-dong, Bundang-gu Seongnam-si Gyeonggi-do KR 463-844
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 "SK hynix"
archived source →
2026-07-17Assigned to "SK hynix"

Nearby in the registry

The prefixes assigned immediately before and after AC:E4:2E:

FAQ

Which company owns MAC address prefix AC:E4:2E?: MAC address prefix AC:E4:2E is registered to SK hynix in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with AC:E4:2E has a network interface built by SK hynix.
What is the OUI AC:E4:2E?: AC:E4:2E is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to SK hynix. It covers every address from AC:E4:2E:00:00:00 to AC:E4:2E:FF:FF:FF, or 16,777,216 addresses in total. It is also written AC-E4-2E.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in AC:E4:2E:00:00:00 that is AC:E4:2E — 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 SK hynix located?: SK hynix is listed at SK u-Tower, 25-1, Jeongja-dong, Bundang-gu Seongnam-si Gyeonggi-do KR 463-844 in the IEEE OUI registry entry for AC:E4:2E. This is the address the organization registered with the IEEE, which may differ from its current operating address.