Which company owns MAC address prefix EC:3C:88?

MAC address prefix EC:3C:88 is registered to MCNEX Co.,Ltd. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with EC:3C:88 has a network interface built by MCNEX Co.,Ltd..

What is the OUI EC:3C:88?

EC:3C:88 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to MCNEX Co.,Ltd.. It covers every address from EC:3C:88:00:00:00 to EC:3C:88:FF:FF:FF, or 16,777,216 addresses in total. It is also written EC-3C-88.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in EC:3C:88:00:00:00 that is EC:3C:88 — 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 MCNEX Co.,Ltd. located?

MCNEX Co.,Ltd. is listed at Hanshin IT Tower2 11F, Digital lo 9 gil Geumcheon-Gu Seoul KR 153-712 in the IEEE OUI registry entry for EC:3C:88. This is the address the organization registered with the IEEE, which may differ from its current operating address.

MCNEX Co.,Ltd.

MAC address prefix EC:3C:88 is registered to MCNEX Co.,Ltd. in the IEEE OUI registry. Any device whose MAC address begins with EC:3C:88 has a network interface built by MCNEX 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 EC:3C:88:00:00:00 to EC:3C:88:FF:FF:FF.

OUI prefix: EC:3C:88
Hyphen form: EC-3C-88
MAC range: EC:3C:88:00:00:00 – EC:3C:88:FF:FF:FF
Addresses in block: 16,777,216
Organization: MCNEX Co.,Ltd.
Address: Hanshin IT Tower2 11F, Digital lo 9 gil Geumcheon-Gu Seoul KR 153-712
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 "MCNEX Co.,Ltd."
archived source →
2026-07-17Assigned to "MCNEX Co.,Ltd."

Nearby in the registry

The prefixes assigned immediately before and after EC:3C:88:

FAQ

Which company owns MAC address prefix EC:3C:88?: MAC address prefix EC:3C:88 is registered to MCNEX Co.,Ltd. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with EC:3C:88 has a network interface built by MCNEX Co.,Ltd..
What is the OUI EC:3C:88?: EC:3C:88 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to MCNEX Co.,Ltd.. It covers every address from EC:3C:88:00:00:00 to EC:3C:88:FF:FF:FF, or 16,777,216 addresses in total. It is also written EC-3C-88.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in EC:3C:88:00:00:00 that is EC:3C:88 — 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 MCNEX Co.,Ltd. located?: MCNEX Co.,Ltd. is listed at Hanshin IT Tower2 11F, Digital lo 9 gil Geumcheon-Gu Seoul KR 153-712 in the IEEE OUI registry entry for EC:3C:88. This is the address the organization registered with the IEEE, which may differ from its current operating address.