Which company owns MAC address prefix B8:25:B5?

MAC address prefix B8:25:B5 is registered to Trakm8 Ltd in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with B8:25:B5 has a network interface built by Trakm8 Ltd.

What is the OUI B8:25:B5?

B8:25:B5 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Trakm8 Ltd. It covers every address from B8:25:B5:00:00:00 to B8:25:B5:FF:FF:FF, or 16,777,216 addresses in total. It is also written B8-25-B5.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in B8:25:B5:00:00:00 that is B8:25:B5 — 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 Trakm8 Ltd located?

Trakm8 Ltd is listed at 4 Roman Park, Roman Way Coleshill West Midlands GB B46 1HG in the IEEE OUI registry entry for B8:25:B5. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Trakm8 Ltd

MAC address prefix B8:25:B5 is registered to Trakm8 Ltd in the IEEE OUI registry. Any device whose MAC address begins with B8:25:B5 has a network interface built by Trakm8 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 B8:25:B5:00:00:00 to B8:25:B5:FF:FF:FF.

OUI prefix: B8:25:B5
Hyphen form: B8-25-B5
MAC range: B8:25:B5:00:00:00 – B8:25:B5:FF:FF:FF
Addresses in block: 16,777,216
Organization: Trakm8 Ltd
Address: 4 Roman Park, Roman Way Coleshill West Midlands GB B46 1HG
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.

2021-06-10Assigned to "Trakm8 Ltd"
archived source →
2026-07-17Assigned to "Trakm8 Ltd"

Nearby in the registry

The prefixes assigned immediately before and after B8:25:B5:

FAQ

Which company owns MAC address prefix B8:25:B5?: MAC address prefix B8:25:B5 is registered to Trakm8 Ltd in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with B8:25:B5 has a network interface built by Trakm8 Ltd.
What is the OUI B8:25:B5?: B8:25:B5 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Trakm8 Ltd. It covers every address from B8:25:B5:00:00:00 to B8:25:B5:FF:FF:FF, or 16,777,216 addresses in total. It is also written B8-25-B5.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in B8:25:B5:00:00:00 that is B8:25:B5 — 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 Trakm8 Ltd located?: Trakm8 Ltd is listed at 4 Roman Park, Roman Way Coleshill West Midlands GB B46 1HG in the IEEE OUI registry entry for B8:25:B5. This is the address the organization registered with the IEEE, which may differ from its current operating address.