Which company owns MAC address prefix 78:2F:17?

MAC address prefix 78:2F:17 is registered to Xlab Co.,Ltd in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 78:2F:17 has a network interface built by Xlab Co.,Ltd.

What is the OUI 78:2F:17?

78:2F:17 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Xlab Co.,Ltd. It covers every address from 78:2F:17:00:00:00 to 78:2F:17:FF:FF:FF, or 16,777,216 addresses in total. It is also written 78-2F-17.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 78:2F:17:00:00:00 that is 78:2F:17 — 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 Xlab Co.,Ltd located?

Xlab Co.,Ltd is listed at #401 4F, Achasan-ro, Seongdong-gu SEOUL KR 04793 in the IEEE OUI registry entry for 78:2F:17. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Xlab Co.,Ltd

MAC address prefix 78:2F:17 is registered to Xlab Co.,Ltd in the IEEE OUI registry. Any device whose MAC address begins with 78:2F:17 has a network interface built by Xlab 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 78:2F:17:00:00:00 to 78:2F:17:FF:FF:FF.

OUI prefix: 78:2F:17
Hyphen form: 78-2F-17
MAC range: 78:2F:17:00:00:00 – 78:2F:17:FF:FF:FF
Addresses in block: 16,777,216
Organization: Xlab Co.,Ltd
Address: #401 4F, Achasan-ro, Seongdong-gu SEOUL KR 04793
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 "Xlab Co.,Ltd"
archived source →
2026-07-17Assigned to "Xlab Co.,Ltd"

Nearby in the registry

The prefixes assigned immediately before and after 78:2F:17:

FAQ

Which company owns MAC address prefix 78:2F:17?: MAC address prefix 78:2F:17 is registered to Xlab Co.,Ltd in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 78:2F:17 has a network interface built by Xlab Co.,Ltd.
What is the OUI 78:2F:17?: 78:2F:17 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Xlab Co.,Ltd. It covers every address from 78:2F:17:00:00:00 to 78:2F:17:FF:FF:FF, or 16,777,216 addresses in total. It is also written 78-2F-17.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 78:2F:17:00:00:00 that is 78:2F:17 — 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 Xlab Co.,Ltd located?: Xlab Co.,Ltd is listed at #401 4F, Achasan-ro, Seongdong-gu SEOUL KR 04793 in the IEEE OUI registry entry for 78:2F:17. This is the address the organization registered with the IEEE, which may differ from its current operating address.