Which company owns MAC address prefix EC:A8:54?

MAC address prefix EC:A8:54 is registered to EFOCE Technology Co., Ltd. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with EC:A8:54 has a network interface built by EFOCE Technology Co., Ltd..

What is the OUI EC:A8:54?

EC:A8:54 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to EFOCE Technology Co., Ltd.. It covers every address from EC:A8:54:00:00:00 to EC:A8:54:FF:FF:FF, or 16,777,216 addresses in total. It is also written EC-A8-54.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in EC:A8:54:00:00:00 that is EC:A8:54 — 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 EFOCE Technology Co., Ltd. located?

EFOCE Technology Co., Ltd. is listed at Room 1116, Building 2, R&D Building, Yanxiang Zhigu, No. 1801 Jufeng Road, Guangming District Shenzhen Guangdong CN 518107 in the IEEE OUI registry entry for EC:A8:54. This is the address the organization registered with the IEEE, which may differ from its current operating address.

EFOCE Technology Co., Ltd.

MAC address prefix EC:A8:54 is registered to EFOCE Technology Co., Ltd. in the IEEE OUI registry. Any device whose MAC address begins with EC:A8:54 has a network interface built by EFOCE Technology 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:A8:54:00:00:00 to EC:A8:54:FF:FF:FF.

OUI prefix: EC:A8:54
Hyphen form: EC-A8-54
MAC range: EC:A8:54:00:00:00 – EC:A8:54:FF:FF:FF
Addresses in block: 16,777,216
Organization: EFOCE Technology Co., Ltd.
Address: Room 1116, Building 2, R&D Building, Yanxiang Zhigu, No. 1801 Jufeng Road, Guangming District Shenzhen Guangdong CN 518107
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 (1)

The IEEE registry publishes current state only — this is the change record we've kept since we started tracking it daily.

2026-07-23Assigned to "EFOCE Technology Co., Ltd."

Nearby in the registry

The prefixes assigned immediately before and after EC:A8:54:

FAQ

Which company owns MAC address prefix EC:A8:54?: MAC address prefix EC:A8:54 is registered to EFOCE Technology Co., Ltd. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with EC:A8:54 has a network interface built by EFOCE Technology Co., Ltd..
What is the OUI EC:A8:54?: EC:A8:54 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to EFOCE Technology Co., Ltd.. It covers every address from EC:A8:54:00:00:00 to EC:A8:54:FF:FF:FF, or 16,777,216 addresses in total. It is also written EC-A8-54.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in EC:A8:54:00:00:00 that is EC:A8:54 — 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 EFOCE Technology Co., Ltd. located?: EFOCE Technology Co., Ltd. is listed at Room 1116, Building 2, R&D Building, Yanxiang Zhigu, No. 1801 Jufeng Road, Guangming District Shenzhen Guangdong CN 518107 in the IEEE OUI registry entry for EC:A8:54. This is the address the organization registered with the IEEE, which may differ from its current operating address.