Which company owns MAC address prefix 30:51:F8?

MAC address prefix 30:51:F8 is registered to BYK-Gardner GmbH in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 30:51:F8 has a network interface built by BYK-Gardner GmbH.

What is the OUI 30:51:F8?

30:51:F8 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to BYK-Gardner GmbH. It covers every address from 30:51:F8:00:00:00 to 30:51:F8:FF:FF:FF, or 16,777,216 addresses in total. It is also written 30-51-F8.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 30:51:F8:00:00:00 that is 30:51:F8 — 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 BYK-Gardner GmbH located?

BYK-Gardner GmbH is listed at Lausitzer Strasse 8 Geretsried Bavarian DE 82538 in the IEEE OUI registry entry for 30:51:F8. This is the address the organization registered with the IEEE, which may differ from its current operating address.

BYK-Gardner GmbH

MAC address prefix 30:51:F8 is registered to BYK-Gardner GmbH in the IEEE OUI registry. Any device whose MAC address begins with 30:51:F8 has a network interface built by BYK-Gardner 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 30:51:F8:00:00:00 to 30:51:F8:FF:FF:FF.

OUI prefix: 30:51:F8
Hyphen form: 30-51-F8
MAC range: 30:51:F8:00:00:00 – 30:51:F8:FF:FF:FF
Addresses in block: 16,777,216
Organization: BYK-Gardner GmbH
Address: Lausitzer Strasse 8 Geretsried Bavarian DE 82538
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 "BYK-Gardner GmbH"
archived source →
2026-07-17Assigned to "BYK-Gardner GmbH"

Nearby in the registry

The prefixes assigned immediately before and after 30:51:F8:

FAQ

Which company owns MAC address prefix 30:51:F8?: MAC address prefix 30:51:F8 is registered to BYK-Gardner GmbH in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 30:51:F8 has a network interface built by BYK-Gardner GmbH.
What is the OUI 30:51:F8?: 30:51:F8 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to BYK-Gardner GmbH. It covers every address from 30:51:F8:00:00:00 to 30:51:F8:FF:FF:FF, or 16,777,216 addresses in total. It is also written 30-51-F8.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 30:51:F8:00:00:00 that is 30:51:F8 — 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 BYK-Gardner GmbH located?: BYK-Gardner GmbH is listed at Lausitzer Strasse 8 Geretsried Bavarian DE 82538 in the IEEE OUI registry entry for 30:51:F8. This is the address the organization registered with the IEEE, which may differ from its current operating address.