Which company owns MAC address prefix 64:4F:B0?

MAC address prefix 64:4F:B0 is registered to Hyunjin.com in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 64:4F:B0 has a network interface built by Hyunjin.com.

What is the OUI 64:4F:B0?

64:4F:B0 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Hyunjin.com. It covers every address from 64:4F:B0:00:00:00 to 64:4F:B0:FF:FF:FF, or 16,777,216 addresses in total. It is also written 64-4F-B0.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 64:4F:B0:00:00:00 that is 64:4F:B0 — 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 Hyunjin.com located?

Hyunjin.com is listed at Hyochang-dong 5-86, Yongsan-gu Seoul KR 140-896 in the IEEE OUI registry entry for 64:4F:B0. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Hyunjin.com

MAC address prefix 64:4F:B0 is registered to Hyunjin.com in the IEEE OUI registry. Any device whose MAC address begins with 64:4F:B0 has a network interface built by Hyunjin.com. 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 64:4F:B0:00:00:00 to 64:4F:B0:FF:FF:FF.

OUI prefix: 64:4F:B0
Hyphen form: 64-4F-B0
MAC range: 64:4F:B0:00:00:00 – 64:4F:B0:FF:FF:FF
Addresses in block: 16,777,216
Organization: Hyunjin.com
Address: Hyochang-dong 5-86, Yongsan-gu Seoul KR 140-896
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 "Hyunjin.com"
archived source →
2026-07-17Assigned to "Hyunjin.com"

Nearby in the registry

The prefixes assigned immediately before and after 64:4F:B0:

FAQ

Which company owns MAC address prefix 64:4F:B0?: MAC address prefix 64:4F:B0 is registered to Hyunjin.com in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 64:4F:B0 has a network interface built by Hyunjin.com.
What is the OUI 64:4F:B0?: 64:4F:B0 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Hyunjin.com. It covers every address from 64:4F:B0:00:00:00 to 64:4F:B0:FF:FF:FF, or 16,777,216 addresses in total. It is also written 64-4F-B0.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 64:4F:B0:00:00:00 that is 64:4F:B0 — 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 Hyunjin.com located?: Hyunjin.com is listed at Hyochang-dong 5-86, Yongsan-gu Seoul KR 140-896 in the IEEE OUI registry entry for 64:4F:B0. This is the address the organization registered with the IEEE, which may differ from its current operating address.