Which company owns MAC address prefix B8:56:BD?

MAC address prefix B8:56:BD is registered to ITT LLC in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with B8:56:BD has a network interface built by ITT LLC.

What is the OUI B8:56:BD?

B8:56:BD is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to ITT LLC. It covers every address from B8:56:BD:00:00:00 to B8:56:BD:FF:FF:FF, or 16,777,216 addresses in total. It is also written B8-56-BD.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in B8:56:BD:00:00:00 that is B8:56:BD — 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 ITT LLC located?

ITT LLC is listed at 1-ya Brestkaya St, building 35 Moscow RU 125047 in the IEEE OUI registry entry for B8:56:BD. This is the address the organization registered with the IEEE, which may differ from its current operating address.

ITT LLC

MAC address prefix B8:56:BD is registered to ITT LLC in the IEEE OUI registry. Any device whose MAC address begins with B8:56:BD has a network interface built by ITT LLC. 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 B8:56:BD:00:00:00 to B8:56:BD:FF:FF:FF.

OUI prefix: B8:56:BD
Hyphen form: B8-56-BD
MAC range: B8:56:BD:00:00:00 – B8:56:BD:FF:FF:FF
Addresses in block: 16,777,216
Organization: ITT LLC
Address: 1-ya Brestkaya St, building 35 Moscow RU 125047
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 "ITT LLC"
archived source →
2026-07-17Assigned to "ITT LLC"

Nearby in the registry

The prefixes assigned immediately before and after B8:56:BD:

FAQ

Which company owns MAC address prefix B8:56:BD?: MAC address prefix B8:56:BD is registered to ITT LLC in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with B8:56:BD has a network interface built by ITT LLC.
What is the OUI B8:56:BD?: B8:56:BD is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to ITT LLC. It covers every address from B8:56:BD:00:00:00 to B8:56:BD:FF:FF:FF, or 16,777,216 addresses in total. It is also written B8-56-BD.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in B8:56:BD:00:00:00 that is B8:56:BD — 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 ITT LLC located?: ITT LLC is listed at 1-ya Brestkaya St, building 35 Moscow RU 125047 in the IEEE OUI registry entry for B8:56:BD. This is the address the organization registered with the IEEE, which may differ from its current operating address.