Which company owns MAC address prefix B8:78:79?

MAC address prefix B8:78:79 is registered to Roche Diagnostics GmbH in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with B8:78:79 has a network interface built by Roche Diagnostics GmbH.

What is the OUI B8:78:79?

B8:78:79 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Roche Diagnostics GmbH. It covers every address from B8:78:79:00:00:00 to B8:78:79:FF:FF:FF, or 16,777,216 addresses in total. It is also written B8-78-79.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in B8:78:79:00:00:00 that is B8:78:79 — 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 Roche Diagnostics GmbH located?

Roche Diagnostics GmbH is listed at Sandhofer Strasse 116 Mannheim Baden-Wuerttemberg DE 68305 in the IEEE OUI registry entry for B8:78:79. This is the address the organization registered with the IEEE, which may differ from its current operating address.

How many MAC prefixes does Roche Diagnostics GmbH own?

Roche Diagnostics GmbH holds 2 OUI prefixes in the IEEE registry, of which B8:78:79 is one. A device made by Roche Diagnostics GmbH could carry a MAC address from any of them.

Roche Diagnostics GmbH

MAC address prefix B8:78:79 is registered to Roche Diagnostics GmbH in the IEEE OUI registry. Any device whose MAC address begins with B8:78:79 has a network interface built by Roche Diagnostics GmbH. 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 B8:78:79:00:00:00 to B8:78:79:FF:FF:FF.

OUI prefix: B8:78:79
Hyphen form: B8-78-79
MAC range: B8:78:79:00:00:00 – B8:78:79:FF:FF:FF
Addresses in block: 16,777,216
Organization: Roche Diagnostics GmbH
Address: Sandhofer Strasse 116 Mannheim Baden-Wuerttemberg DE 68305
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.

Other prefixes from Roche Diagnostics GmbH

Roche Diagnostics GmbH holds 2 OUI prefixes in total. A device with this exact prefix could just as well carry any of these:

00:0E:2F

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 "Roche Diagnostics GmbH"
archived source →
2026-07-17Assigned to "Roche Diagnostics GmbH"

Nearby in the registry

The prefixes assigned immediately before and after B8:78:79:

FAQ

Which company owns MAC address prefix B8:78:79?: MAC address prefix B8:78:79 is registered to Roche Diagnostics GmbH in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with B8:78:79 has a network interface built by Roche Diagnostics GmbH.
What is the OUI B8:78:79?: B8:78:79 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Roche Diagnostics GmbH. It covers every address from B8:78:79:00:00:00 to B8:78:79:FF:FF:FF, or 16,777,216 addresses in total. It is also written B8-78-79.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in B8:78:79:00:00:00 that is B8:78:79 — 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 Roche Diagnostics GmbH located?: Roche Diagnostics GmbH is listed at Sandhofer Strasse 116 Mannheim Baden-Wuerttemberg DE 68305 in the IEEE OUI registry entry for B8:78:79. This is the address the organization registered with the IEEE, which may differ from its current operating address.
How many MAC prefixes does Roche Diagnostics GmbH own?: Roche Diagnostics GmbH holds 2 OUI prefixes in the IEEE registry, of which B8:78:79 is one. A device made by Roche Diagnostics GmbH could carry a MAC address from any of them.