Which company owns MAC address prefix 10:78:CE?

MAC address prefix 10:78:CE is registered to Hanvit SI, Inc. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 10:78:CE has a network interface built by Hanvit SI, Inc..

What is the OUI 10:78:CE?

10:78:CE is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Hanvit SI, Inc.. It covers every address from 10:78:CE:00:00:00 to 10:78:CE:FF:FF:FF, or 16,777,216 addresses in total. It is also written 10-78-CE.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 10:78:CE:00:00:00 that is 10:78:CE — 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 Hanvit SI, Inc. located?

Hanvit SI, Inc. is listed at #201 Daeheung Building, 265-18 Yangjae-dong Seoul KR 137130 in the IEEE OUI registry entry for 10:78:CE. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Hanvit SI, Inc.

MAC address prefix 10:78:CE is registered to Hanvit SI, Inc. in the IEEE OUI registry. Any device whose MAC address begins with 10:78:CE has a network interface built by Hanvit SI, Inc.. 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 10:78:CE:00:00:00 to 10:78:CE:FF:FF:FF.

OUI prefix: 10:78:CE
Hyphen form: 10-78-CE
MAC range: 10:78:CE:00:00:00 – 10:78:CE:FF:FF:FF
Addresses in block: 16,777,216
Organization: Hanvit SI, Inc.
Address: #201 Daeheung Building, 265-18 Yangjae-dong Seoul KR 137130
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 "Hanvit SI, Inc."
archived source →
2026-07-17Assigned to "Hanvit SI, Inc."

Nearby in the registry

The prefixes assigned immediately before and after 10:78:CE:

FAQ

Which company owns MAC address prefix 10:78:CE?: MAC address prefix 10:78:CE is registered to Hanvit SI, Inc. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 10:78:CE has a network interface built by Hanvit SI, Inc..
What is the OUI 10:78:CE?: 10:78:CE is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Hanvit SI, Inc.. It covers every address from 10:78:CE:00:00:00 to 10:78:CE:FF:FF:FF, or 16,777,216 addresses in total. It is also written 10-78-CE.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 10:78:CE:00:00:00 that is 10:78:CE — 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 Hanvit SI, Inc. located?: Hanvit SI, Inc. is listed at #201 Daeheung Building, 265-18 Yangjae-dong Seoul KR 137130 in the IEEE OUI registry entry for 10:78:CE. This is the address the organization registered with the IEEE, which may differ from its current operating address.