Which company owns MAC address prefix E8:EF:05?

MAC address prefix E8:EF:05 is registered to MIND TECH INTERNATIONAL LIMITED in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with E8:EF:05 has a network interface built by MIND TECH INTERNATIONAL LIMITED.

What is the OUI E8:EF:05?

E8:EF:05 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to MIND TECH INTERNATIONAL LIMITED. It covers every address from E8:EF:05:00:00:00 to E8:EF:05:FF:FF:FF, or 16,777,216 addresses in total. It is also written E8-EF-05.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in E8:EF:05:00:00:00 that is E8:EF:05 — 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 MIND TECH INTERNATIONAL LIMITED located?

MIND TECH INTERNATIONAL LIMITED is listed at FLAT E 2/F RIALTO MANSION 183 KING'S RD NORTH POINT HK Hong Kong HK 999077 in the IEEE OUI registry entry for E8:EF:05. This is the address the organization registered with the IEEE, which may differ from its current operating address.

MIND TECH INTERNATIONAL LIMITED

MAC address prefix E8:EF:05 is registered to MIND TECH INTERNATIONAL LIMITED in the IEEE OUI registry. Any device whose MAC address begins with E8:EF:05 has a network interface built by MIND TECH INTERNATIONAL LIMITED. 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 E8:EF:05:00:00:00 to E8:EF:05:FF:FF:FF.

OUI prefix: E8:EF:05
Hyphen form: E8-EF-05
MAC range: E8:EF:05:00:00:00 – E8:EF:05:FF:FF:FF
Addresses in block: 16,777,216
Organization: MIND TECH INTERNATIONAL LIMITED
Address: FLAT E 2/F RIALTO MANSION 183 KING'S RD NORTH POINT HK Hong Kong HK 999077
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.

2022-07-11Assigned to "MIND TECH INTERNATIONAL LIMITED"
archived source →
2026-07-17Assigned to "MIND TECH INTERNATIONAL LIMITED"

Nearby in the registry

The prefixes assigned immediately before and after E8:EF:05:

FAQ

Which company owns MAC address prefix E8:EF:05?: MAC address prefix E8:EF:05 is registered to MIND TECH INTERNATIONAL LIMITED in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with E8:EF:05 has a network interface built by MIND TECH INTERNATIONAL LIMITED.
What is the OUI E8:EF:05?: E8:EF:05 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to MIND TECH INTERNATIONAL LIMITED. It covers every address from E8:EF:05:00:00:00 to E8:EF:05:FF:FF:FF, or 16,777,216 addresses in total. It is also written E8-EF-05.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in E8:EF:05:00:00:00 that is E8:EF:05 — 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 MIND TECH INTERNATIONAL LIMITED located?: MIND TECH INTERNATIONAL LIMITED is listed at FLAT E 2/F RIALTO MANSION 183 KING'S RD NORTH POINT HK Hong Kong HK 999077 in the IEEE OUI registry entry for E8:EF:05. This is the address the organization registered with the IEEE, which may differ from its current operating address.