Which company owns MAC address prefix 3C:10:40?

MAC address prefix 3C:10:40 is registered to daesung network in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 3C:10:40 has a network interface built by daesung network.

What is the OUI 3C:10:40?

3C:10:40 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to daesung network. It covers every address from 3C:10:40:00:00:00 to 3C:10:40:FF:FF:FF, or 16,777,216 addresses in total. It is also written 3C-10-40.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 3C:10:40:00:00:00 that is 3C:10:40 — 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 daesung network located?

daesung network is listed at #209 e-space Bldg,Guro-dong,Guro-gu Seoul KR 152-789 in the IEEE OUI registry entry for 3C:10:40. This is the address the organization registered with the IEEE, which may differ from its current operating address.

daesung network

MAC address prefix 3C:10:40 is registered to daesung network in the IEEE OUI registry. Any device whose MAC address begins with 3C:10:40 has a network interface built by daesung network. 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 3C:10:40:00:00:00 to 3C:10:40:FF:FF:FF.

OUI prefix: 3C:10:40
Hyphen form: 3C-10-40
MAC range: 3C:10:40:00:00:00 – 3C:10:40:FF:FF:FF
Addresses in block: 16,777,216
Organization: daesung network
Address: #209 e-space Bldg,Guro-dong,Guro-gu Seoul KR 152-789
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 "daesung network"
archived source →
2026-07-17Assigned to "daesung network"

Nearby in the registry

The prefixes assigned immediately before and after 3C:10:40:

FAQ

Which company owns MAC address prefix 3C:10:40?: MAC address prefix 3C:10:40 is registered to daesung network in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 3C:10:40 has a network interface built by daesung network.
What is the OUI 3C:10:40?: 3C:10:40 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to daesung network. It covers every address from 3C:10:40:00:00:00 to 3C:10:40:FF:FF:FF, or 16,777,216 addresses in total. It is also written 3C-10-40.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 3C:10:40:00:00:00 that is 3C:10:40 — 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 daesung network located?: daesung network is listed at #209 e-space Bldg,Guro-dong,Guro-gu Seoul KR 152-789 in the IEEE OUI registry entry for 3C:10:40. This is the address the organization registered with the IEEE, which may differ from its current operating address.