Which company owns MAC address prefix 00:17:ED?

MAC address prefix 00:17:ED is registered to WooJooIT Ltd. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 00:17:ED has a network interface built by WooJooIT Ltd..

What is the OUI 00:17:ED?

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

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 00:17:ED:00:00:00 that is 00:17:ED — 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 WooJooIT Ltd. located?

WooJooIT Ltd. is listed at Hankooktire B/D 4th floor, 501-19, Yangcheon-gu, Seoul KR 158-839 in the IEEE OUI registry entry for 00:17:ED. This is the address the organization registered with the IEEE, which may differ from its current operating address.

WooJooIT Ltd.

MAC address prefix 00:17:ED is registered to WooJooIT Ltd. in the IEEE OUI registry. Any device whose MAC address begins with 00:17:ED has a network interface built by WooJooIT 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 00:17:ED:00:00:00 to 00:17:ED:FF:FF:FF.

OUI prefix: 00:17:ED
Hyphen form: 00-17-ED
MAC range: 00:17:ED:00:00:00 – 00:17:ED:FF:FF:FF
Addresses in block: 16,777,216
Organization: WooJooIT Ltd.
Address: Hankooktire B/D 4th floor, 501-19, Yangcheon-gu, Seoul KR 158-839
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 "WooJooIT Ltd."
archived source →
2026-07-17Assigned to "WooJooIT Ltd."

Nearby in the registry

The prefixes assigned immediately before and after 00:17:ED:

FAQ

Which company owns MAC address prefix 00:17:ED?: MAC address prefix 00:17:ED is registered to WooJooIT Ltd. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 00:17:ED has a network interface built by WooJooIT Ltd..
What is the OUI 00:17:ED?: 00:17:ED is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to WooJooIT Ltd.. It covers every address from 00:17:ED:00:00:00 to 00:17:ED:FF:FF:FF, or 16,777,216 addresses in total. It is also written 00-17-ED.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 00:17:ED:00:00:00 that is 00:17:ED — 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 WooJooIT Ltd. located?: WooJooIT Ltd. is listed at Hankooktire B/D 4th floor, 501-19, Yangcheon-gu, Seoul KR 158-839 in the IEEE OUI registry entry for 00:17:ED. This is the address the organization registered with the IEEE, which may differ from its current operating address.