Which company owns MAC address prefix B4:B2:65?

MAC address prefix B4:B2:65 is registered to DAEHO I&T in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with B4:B2:65 has a network interface built by DAEHO I&T.

What is the OUI B4:B2:65?

B4:B2:65 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to DAEHO I&T. It covers every address from B4:B2:65:00:00:00 to B4:B2:65:FF:FF:FF, or 16,777,216 addresses in total. It is also written B4-B2-65.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in B4:B2:65:00:00:00 that is B4:B2:65 — 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 DAEHO I&T located?

DAEHO I&T is listed at 211, Jayumuyeok 3-gil, MasanHoewon-gu Changwon-si Gyeongsangnam-do KR 630-812 in the IEEE OUI registry entry for B4:B2:65. This is the address the organization registered with the IEEE, which may differ from its current operating address.

DAEHO I&T

MAC address prefix B4:B2:65 is registered to DAEHO I&T in the IEEE OUI registry. Any device whose MAC address begins with B4:B2:65 has a network interface built by DAEHO I&T. 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 B4:B2:65:00:00:00 to B4:B2:65:FF:FF:FF.

OUI prefix: B4:B2:65
Hyphen form: B4-B2-65
MAC range: B4:B2:65:00:00:00 – B4:B2:65:FF:FF:FF
Addresses in block: 16,777,216
Organization: DAEHO I&T
Address: 211, Jayumuyeok 3-gil, MasanHoewon-gu Changwon-si Gyeongsangnam-do KR 630-812
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 "DAEHO I&T"
archived source →
2026-07-17Assigned to "DAEHO I&T"

Nearby in the registry

The prefixes assigned immediately before and after B4:B2:65:

FAQ

Which company owns MAC address prefix B4:B2:65?: MAC address prefix B4:B2:65 is registered to DAEHO I&T in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with B4:B2:65 has a network interface built by DAEHO I&T.
What is the OUI B4:B2:65?: B4:B2:65 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to DAEHO I&T. It covers every address from B4:B2:65:00:00:00 to B4:B2:65:FF:FF:FF, or 16,777,216 addresses in total. It is also written B4-B2-65.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in B4:B2:65:00:00:00 that is B4:B2:65 — 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 DAEHO I&T located?: DAEHO I&T is listed at 211, Jayumuyeok 3-gil, MasanHoewon-gu Changwon-si Gyeongsangnam-do KR 630-812 in the IEEE OUI registry entry for B4:B2:65. This is the address the organization registered with the IEEE, which may differ from its current operating address.