Which company owns MAC address prefix 0C:57:EB?

MAC address prefix 0C:57:EB is registered to Mueller Systems in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 0C:57:EB has a network interface built by Mueller Systems.

What is the OUI 0C:57:EB?

0C:57:EB is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Mueller Systems. It covers every address from 0C:57:EB:00:00:00 to 0C:57:EB:FF:FF:FF, or 16,777,216 addresses in total. It is also written 0C-57-EB.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 0C:57:EB:00:00:00 that is 0C:57:EB — 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 Mueller Systems located?

Mueller Systems is listed at 48 Leona Drive, Suite C Middleboro MA US 02346 in the IEEE OUI registry entry for 0C:57:EB. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Mueller Systems

MAC address prefix 0C:57:EB is registered to Mueller Systems in the IEEE OUI registry. Any device whose MAC address begins with 0C:57:EB has a network interface built by Mueller Systems. 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 0C:57:EB:00:00:00 to 0C:57:EB:FF:FF:FF.

OUI prefix: 0C:57:EB
Hyphen form: 0C-57-EB
MAC range: 0C:57:EB:00:00:00 – 0C:57:EB:FF:FF:FF
Addresses in block: 16,777,216
Organization: Mueller Systems
Address: 48 Leona Drive, Suite C Middleboro MA US 02346
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 "Mueller Systems"
archived source →
2026-07-17Assigned to "Mueller Systems"

Nearby in the registry

The prefixes assigned immediately before and after 0C:57:EB:

FAQ

Which company owns MAC address prefix 0C:57:EB?: MAC address prefix 0C:57:EB is registered to Mueller Systems in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 0C:57:EB has a network interface built by Mueller Systems.
What is the OUI 0C:57:EB?: 0C:57:EB is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Mueller Systems. It covers every address from 0C:57:EB:00:00:00 to 0C:57:EB:FF:FF:FF, or 16,777,216 addresses in total. It is also written 0C-57-EB.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 0C:57:EB:00:00:00 that is 0C:57:EB — 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 Mueller Systems located?: Mueller Systems is listed at 48 Leona Drive, Suite C Middleboro MA US 02346 in the IEEE OUI registry entry for 0C:57:EB. This is the address the organization registered with the IEEE, which may differ from its current operating address.