Which company owns MAC address prefix BC:39:D9?

MAC address prefix BC:39:D9 is registered to Z-TEC in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with BC:39:D9 has a network interface built by Z-TEC.

What is the OUI BC:39:D9?

BC:39:D9 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Z-TEC. It covers every address from BC:39:D9:00:00:00 to BC:39:D9:FF:FF:FF, or 16,777,216 addresses in total. It is also written BC-39-D9.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in BC:39:D9:00:00:00 that is BC:39:D9 — 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 Z-TEC located?

Z-TEC is listed at Donyu 1 Ro Paju Kyeongkido KR 10832 in the IEEE OUI registry entry for BC:39:D9. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Z-TEC

MAC address prefix BC:39:D9 is registered to Z-TEC in the IEEE OUI registry. Any device whose MAC address begins with BC:39:D9 has a network interface built by Z-TEC. 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:39:D9:00:00:00 to BC:39:D9:FF:FF:FF.

OUI prefix: BC:39:D9
Hyphen form: BC-39-D9
MAC range: BC:39:D9:00:00:00 – BC:39:D9:FF:FF:FF
Addresses in block: 16,777,216
Organization: Z-TEC
Address: Donyu 1 Ro Paju Kyeongkido KR 10832
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 "Z-TEC"
archived source →
2026-07-17Assigned to "Z-TEC"

Nearby in the registry

The prefixes assigned immediately before and after BC:39:D9:

FAQ

Which company owns MAC address prefix BC:39:D9?: MAC address prefix BC:39:D9 is registered to Z-TEC in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with BC:39:D9 has a network interface built by Z-TEC.
What is the OUI BC:39:D9?: BC:39:D9 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Z-TEC. It covers every address from BC:39:D9:00:00:00 to BC:39:D9:FF:FF:FF, or 16,777,216 addresses in total. It is also written BC-39-D9.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in BC:39:D9:00:00:00 that is BC:39:D9 — 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 Z-TEC located?: Z-TEC is listed at Donyu 1 Ro Paju Kyeongkido KR 10832 in the IEEE OUI registry entry for BC:39:D9. This is the address the organization registered with the IEEE, which may differ from its current operating address.