Which company owns MAC address prefix BC:B2:2B?

MAC address prefix BC:B2:2B is registered to EM-Tech in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with BC:B2:2B has a network interface built by EM-Tech.

What is the OUI BC:B2:2B?

BC:B2:2B is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to EM-Tech. It covers every address from BC:B2:2B:00:00:00 to BC:B2:2B:FF:FF:FF, or 16,777,216 addresses in total. It is also written BC-B2-2B.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in BC:B2:2B:00:00:00 that is BC:B2:2B — 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 EM-Tech located?

EM-Tech is listed at 40, Changwon-daero 1144beon-gil Seongsan-gu Changwon Gyeongsangnam-do KR KR 642-120 in the IEEE OUI registry entry for BC:B2:2B. This is the address the organization registered with the IEEE, which may differ from its current operating address.

EM-Tech

MAC address prefix BC:B2:2B is registered to EM-Tech in the IEEE OUI registry. Any device whose MAC address begins with BC:B2:2B has a network interface built by EM-Tech. 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:B2:2B:00:00:00 to BC:B2:2B:FF:FF:FF.

OUI prefix: BC:B2:2B
Hyphen form: BC-B2-2B
MAC range: BC:B2:2B:00:00:00 – BC:B2:2B:FF:FF:FF
Addresses in block: 16,777,216
Organization: EM-Tech
Address: 40, Changwon-daero 1144beon-gil Seongsan-gu Changwon Gyeongsangnam-do KR KR 642-120
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.

2018-12-21Assigned to "EM-Tech"
archived source →
2026-07-17Assigned to "EM-Tech"

Nearby in the registry

The prefixes assigned immediately before and after BC:B2:2B:

FAQ

Which company owns MAC address prefix BC:B2:2B?: MAC address prefix BC:B2:2B is registered to EM-Tech in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with BC:B2:2B has a network interface built by EM-Tech.
What is the OUI BC:B2:2B?: BC:B2:2B is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to EM-Tech. It covers every address from BC:B2:2B:00:00:00 to BC:B2:2B:FF:FF:FF, or 16,777,216 addresses in total. It is also written BC-B2-2B.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in BC:B2:2B:00:00:00 that is BC:B2:2B — 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 EM-Tech located?: EM-Tech is listed at 40, Changwon-daero 1144beon-gil Seongsan-gu Changwon Gyeongsangnam-do KR KR 642-120 in the IEEE OUI registry entry for BC:B2:2B. This is the address the organization registered with the IEEE, which may differ from its current operating address.