Which company owns MAC address prefix E4:7C:1A?

MAC address prefix E4:7C:1A is registered to mercury corperation in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with E4:7C:1A has a network interface built by mercury corperation.

What is the OUI E4:7C:1A?

E4:7C:1A is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to mercury corperation. It covers every address from E4:7C:1A:00:00:00 to E4:7C:1A:FF:FF:FF, or 16,777,216 addresses in total. It is also written E4-7C-1A.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in E4:7C:1A:00:00:00 that is E4:7C:1A — 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 mercury corperation located?

mercury corperation is listed at 90,gajaeul-ro,seo-gu,incheon incheon KR 22830 in the IEEE OUI registry entry for E4:7C:1A. This is the address the organization registered with the IEEE, which may differ from its current operating address.

How many MAC prefixes does mercury corperation own?

mercury corperation holds 2 OUI prefixes in the IEEE registry, of which E4:7C:1A is one. A device made by mercury corperation could carry a MAC address from any of them.

mercury corperation

MAC address prefix E4:7C:1A is registered to mercury corperation in the IEEE OUI registry. Any device whose MAC address begins with E4:7C:1A has a network interface built by mercury corperation. 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 E4:7C:1A:00:00:00 to E4:7C:1A:FF:FF:FF.

OUI prefix: E4:7C:1A
Hyphen form: E4-7C-1A
MAC range: E4:7C:1A:00:00:00 – E4:7C:1A:FF:FF:FF
Addresses in block: 16,777,216
Organization: mercury corperation
Address: 90,gajaeul-ro,seo-gu,incheon incheon KR 22830
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.

Other prefixes from mercury corperation

mercury corperation holds 2 OUI prefixes in total. A device with this exact prefix could just as well carry any of these:

28:4E:E9

Assignment history (2)

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

2026-01-08Assigned to "mercury corperation"
archived source →
2026-07-17Assigned to "mercury corperation"

Nearby in the registry

The prefixes assigned immediately before and after E4:7C:1A:

FAQ

Which company owns MAC address prefix E4:7C:1A?: MAC address prefix E4:7C:1A is registered to mercury corperation in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with E4:7C:1A has a network interface built by mercury corperation.
What is the OUI E4:7C:1A?: E4:7C:1A is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to mercury corperation. It covers every address from E4:7C:1A:00:00:00 to E4:7C:1A:FF:FF:FF, or 16,777,216 addresses in total. It is also written E4-7C-1A.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in E4:7C:1A:00:00:00 that is E4:7C:1A — 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 mercury corperation located?: mercury corperation is listed at 90,gajaeul-ro,seo-gu,incheon incheon KR 22830 in the IEEE OUI registry entry for E4:7C:1A. This is the address the organization registered with the IEEE, which may differ from its current operating address.
How many MAC prefixes does mercury corperation own?: mercury corperation holds 2 OUI prefixes in the IEEE registry, of which E4:7C:1A is one. A device made by mercury corperation could carry a MAC address from any of them.