Which company owns MAC address prefix 18:41:FE?

MAC address prefix 18:41:FE is registered to KATIM L.L.C in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 18:41:FE has a network interface built by KATIM L.L.C.

What is the OUI 18:41:FE?

18:41:FE is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to KATIM L.L.C. It covers every address from 18:41:FE:00:00:00 to 18:41:FE:FF:FF:FF, or 16,777,216 addresses in total. It is also written 18-41-FE.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 18:41:FE:00:00:00 that is 18:41:FE — 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 KATIM L.L.C located?

KATIM L.L.C is listed at Elektroniikkatie 8 Oulu FI 90590 in the IEEE OUI registry entry for 18:41:FE. This is the address the organization registered with the IEEE, which may differ from its current operating address.

KATIM L.L.C

MAC address prefix 18:41:FE is registered to KATIM L.L.C in the IEEE OUI registry. Any device whose MAC address begins with 18:41:FE has a network interface built by KATIM L.L.C. 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 18:41:FE:00:00:00 to 18:41:FE:FF:FF:FF.

OUI prefix: 18:41:FE
Hyphen form: 18-41-FE
MAC range: 18:41:FE:00:00:00 – 18:41:FE:FF:FF:FF
Addresses in block: 16,777,216
Organization: KATIM L.L.C
Address: Elektroniikkatie 8 Oulu FI 90590
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 (3)

The IEEE registry publishes current state only — this is the change record we've kept since we started tracking it daily.

2020-04-23Assigned to "Digital 14"
archived source →
2026-01-08Renamed from "Digital 14" to "KATIM L.L.C"
archived source →
2026-07-17Assigned to "KATIM L.L.C"

Nearby in the registry

The prefixes assigned immediately before and after 18:41:FE:

FAQ

Which company owns MAC address prefix 18:41:FE?: MAC address prefix 18:41:FE is registered to KATIM L.L.C in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 18:41:FE has a network interface built by KATIM L.L.C.
What is the OUI 18:41:FE?: 18:41:FE is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to KATIM L.L.C. It covers every address from 18:41:FE:00:00:00 to 18:41:FE:FF:FF:FF, or 16,777,216 addresses in total. It is also written 18-41-FE.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 18:41:FE:00:00:00 that is 18:41:FE — 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 KATIM L.L.C located?: KATIM L.L.C is listed at Elektroniikkatie 8 Oulu FI 90590 in the IEEE OUI registry entry for 18:41:FE. This is the address the organization registered with the IEEE, which may differ from its current operating address.