Which company owns MAC address prefix BC:71:C1?

MAC address prefix BC:71:C1 is registered to XTrillion, Inc. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with BC:71:C1 has a network interface built by XTrillion, Inc..

What is the OUI BC:71:C1?

BC:71:C1 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to XTrillion, Inc.. It covers every address from BC:71:C1:00:00:00 to BC:71:C1:FF:FF:FF, or 16,777,216 addresses in total. It is also written BC-71-C1.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in BC:71:C1:00:00:00 that is BC:71:C1 — 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 XTrillion, Inc. located?

XTrillion, Inc. is listed at 1-12-3-4F Chiyoda-ku Tokyo JP 101-0041 in the IEEE OUI registry entry for BC:71:C1. This is the address the organization registered with the IEEE, which may differ from its current operating address.

XTrillion, Inc.

MAC address prefix BC:71:C1 is registered to XTrillion, Inc. in the IEEE OUI registry. Any device whose MAC address begins with BC:71:C1 has a network interface built by XTrillion, 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:71:C1:00:00:00 to BC:71:C1:FF:FF:FF.

OUI prefix: BC:71:C1
Hyphen form: BC-71-C1
MAC range: BC:71:C1:00:00:00 – BC:71:C1:FF:FF:FF
Addresses in block: 16,777,216
Organization: XTrillion, Inc.
Address: 1-12-3-4F Chiyoda-ku Tokyo JP 101-0041
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 "XTrillion, Inc."
archived source →
2026-07-17Assigned to "XTrillion, Inc."

Nearby in the registry

The prefixes assigned immediately before and after BC:71:C1:

FAQ

Which company owns MAC address prefix BC:71:C1?: MAC address prefix BC:71:C1 is registered to XTrillion, Inc. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with BC:71:C1 has a network interface built by XTrillion, Inc..
What is the OUI BC:71:C1?: BC:71:C1 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to XTrillion, Inc.. It covers every address from BC:71:C1:00:00:00 to BC:71:C1:FF:FF:FF, or 16,777,216 addresses in total. It is also written BC-71-C1.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in BC:71:C1:00:00:00 that is BC:71:C1 — 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 XTrillion, Inc. located?: XTrillion, Inc. is listed at 1-12-3-4F Chiyoda-ku Tokyo JP 101-0041 in the IEEE OUI registry entry for BC:71:C1. This is the address the organization registered with the IEEE, which may differ from its current operating address.