Which company owns MAC address prefix 1C:86:AD?

MAC address prefix 1C:86:AD is registered to MCT CO., LTD. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 1C:86:AD has a network interface built by MCT CO., LTD..

What is the OUI 1C:86:AD?

1C:86:AD is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to MCT CO., LTD.. It covers every address from 1C:86:AD:00:00:00 to 1C:86:AD:FF:FF:FF, or 16,777,216 addresses in total. It is also written 1C-86-AD.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 1C:86:AD:00:00:00 that is 1C:86:AD — 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 MCT CO., LTD. located?

MCT CO., LTD. is listed at C-815/816, Garden5 Works, 52 Chungmin-ro Songpa-gu Seoul KR 138-961 in the IEEE OUI registry entry for 1C:86:AD. This is the address the organization registered with the IEEE, which may differ from its current operating address.

MCT CO., LTD.

MAC address prefix 1C:86:AD is registered to MCT CO., LTD. in the IEEE OUI registry. Any device whose MAC address begins with 1C:86:AD has a network interface built by MCT CO., LTD.. 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 1C:86:AD:00:00:00 to 1C:86:AD:FF:FF:FF.

OUI prefix: 1C:86:AD
Hyphen form: 1C-86-AD
MAC range: 1C:86:AD:00:00:00 – 1C:86:AD:FF:FF:FF
Addresses in block: 16,777,216
Organization: MCT CO., LTD.
Address: C-815/816, Garden5 Works, 52 Chungmin-ro Songpa-gu Seoul KR 138-961
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 "MCT CO., LTD."
archived source →
2026-07-17Assigned to "MCT CO., LTD."

Nearby in the registry

The prefixes assigned immediately before and after 1C:86:AD:

FAQ

Which company owns MAC address prefix 1C:86:AD?: MAC address prefix 1C:86:AD is registered to MCT CO., LTD. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 1C:86:AD has a network interface built by MCT CO., LTD..
What is the OUI 1C:86:AD?: 1C:86:AD is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to MCT CO., LTD.. It covers every address from 1C:86:AD:00:00:00 to 1C:86:AD:FF:FF:FF, or 16,777,216 addresses in total. It is also written 1C-86-AD.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 1C:86:AD:00:00:00 that is 1C:86:AD — 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 MCT CO., LTD. located?: MCT CO., LTD. is listed at C-815/816, Garden5 Works, 52 Chungmin-ro Songpa-gu Seoul KR 138-961 in the IEEE OUI registry entry for 1C:86:AD. This is the address the organization registered with the IEEE, which may differ from its current operating address.