Which company owns MAC address prefix BC:2C:55?

MAC address prefix BC:2C:55 is registered to Bear Flag Design, Inc. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with BC:2C:55 has a network interface built by Bear Flag Design, Inc..

What is the OUI BC:2C:55?

BC:2C:55 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Bear Flag Design, Inc.. It covers every address from BC:2C:55:00:00:00 to BC:2C:55:FF:FF:FF, or 16,777,216 addresses in total. It is also written BC-2C-55.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in BC:2C:55:00:00:00 that is BC:2C:55 — 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 Bear Flag Design, Inc. located?

Bear Flag Design, Inc. is listed at 1 Thayer Road Santa Cruz CA US 95060 in the IEEE OUI registry entry for BC:2C:55. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Bear Flag Design, Inc.

MAC address prefix BC:2C:55 is registered to Bear Flag Design, Inc. in the IEEE OUI registry. Any device whose MAC address begins with BC:2C:55 has a network interface built by Bear Flag Design, Inc.. 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 BC:2C:55:00:00:00 to BC:2C:55:FF:FF:FF.

OUI prefix: BC:2C:55
Hyphen form: BC-2C-55
MAC range: BC:2C:55:00:00:00 – BC:2C:55:FF:FF:FF
Addresses in block: 16,777,216
Organization: Bear Flag Design, Inc.
Address: 1 Thayer Road Santa Cruz CA US 95060
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 "Bear Flag Design, Inc."
archived source →
2026-07-17Assigned to "Bear Flag Design, Inc."

Nearby in the registry

The prefixes assigned immediately before and after BC:2C:55:

FAQ

Which company owns MAC address prefix BC:2C:55?: MAC address prefix BC:2C:55 is registered to Bear Flag Design, Inc. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with BC:2C:55 has a network interface built by Bear Flag Design, Inc..
What is the OUI BC:2C:55?: BC:2C:55 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Bear Flag Design, Inc.. It covers every address from BC:2C:55:00:00:00 to BC:2C:55:FF:FF:FF, or 16,777,216 addresses in total. It is also written BC-2C-55.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in BC:2C:55:00:00:00 that is BC:2C:55 — 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 Bear Flag Design, Inc. located?: Bear Flag Design, Inc. is listed at 1 Thayer Road Santa Cruz CA US 95060 in the IEEE OUI registry entry for BC:2C:55. This is the address the organization registered with the IEEE, which may differ from its current operating address.