Which company owns MAC address prefix DC:63:73?

MAC address prefix DC:63:73 is registered to OBARA KOREA in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with DC:63:73 has a network interface built by OBARA KOREA.

What is the OUI DC:63:73?

DC:63:73 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to OBARA KOREA. It covers every address from DC:63:73:00:00:00 to DC:63:73:FF:FF:FF, or 16,777,216 addresses in total. It is also written DC-63-73.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in DC:63:73:00:00:00 that is DC:63:73 — 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 OBARA KOREA located?

OBARA KOREA is listed at 97-23, Barangongdan-ro 4-gil Hwaseong-si Gyeonggi-do KR 18623 in the IEEE OUI registry entry for DC:63:73. This is the address the organization registered with the IEEE, which may differ from its current operating address.

OBARA KOREA

MAC address prefix DC:63:73 is registered to OBARA KOREA in the IEEE OUI registry. Any device whose MAC address begins with DC:63:73 has a network interface built by OBARA KOREA. 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 DC:63:73:00:00:00 to DC:63:73:FF:FF:FF.

OUI prefix: DC:63:73
Hyphen form: DC-63-73
MAC range: DC:63:73:00:00:00 – DC:63:73:FF:FF:FF
Addresses in block: 16,777,216
Organization: OBARA KOREA
Address: 97-23, Barangongdan-ro 4-gil Hwaseong-si Gyeonggi-do KR 18623
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.

2020-11-28Assigned to "OBARA KOREA"
archived source →
2026-07-17Assigned to "OBARA KOREA"

Nearby in the registry

The prefixes assigned immediately before and after DC:63:73:

FAQ

Which company owns MAC address prefix DC:63:73?: MAC address prefix DC:63:73 is registered to OBARA KOREA in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with DC:63:73 has a network interface built by OBARA KOREA.
What is the OUI DC:63:73?: DC:63:73 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to OBARA KOREA. It covers every address from DC:63:73:00:00:00 to DC:63:73:FF:FF:FF, or 16,777,216 addresses in total. It is also written DC-63-73.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in DC:63:73:00:00:00 that is DC:63:73 — 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 OBARA KOREA located?: OBARA KOREA is listed at 97-23, Barangongdan-ro 4-gil Hwaseong-si Gyeonggi-do KR 18623 in the IEEE OUI registry entry for DC:63:73. This is the address the organization registered with the IEEE, which may differ from its current operating address.