Which company owns MAC address prefix 48:81:4E?

MAC address prefix 48:81:4E is registered to E&M SOLUTION CO,.Ltd in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 48:81:4E has a network interface built by E&M SOLUTION CO,.Ltd.

What is the OUI 48:81:4E?

48:81:4E is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to E&M SOLUTION CO,.Ltd. It covers every address from 48:81:4E:00:00:00 to 48:81:4E:FF:FF:FF, or 16,777,216 addresses in total. It is also written 48-81-4E.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 48:81:4E:00:00:00 that is 48:81:4E — 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 E&M SOLUTION CO,.Ltd located?

E&M SOLUTION CO,.Ltd is listed at #813-ho, 555, Byeolmang-ro Ansan-si Danwon-gu KR 15434 in the IEEE OUI registry entry for 48:81:4E. This is the address the organization registered with the IEEE, which may differ from its current operating address.

E&M SOLUTION CO,.Ltd

MAC address prefix 48:81:4E is registered to E&M SOLUTION CO,.Ltd in the IEEE OUI registry. Any device whose MAC address begins with 48:81:4E has a network interface built by E&M SOLUTION 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 48:81:4E:00:00:00 to 48:81:4E:FF:FF:FF.

OUI prefix: 48:81:4E
Hyphen form: 48-81-4E
MAC range: 48:81:4E:00:00:00 – 48:81:4E:FF:FF:FF
Addresses in block: 16,777,216
Organization: E&M SOLUTION CO,.Ltd
Address: #813-ho, 555, Byeolmang-ro Ansan-si Danwon-gu KR 15434
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.

2026-07-17Assigned to "E&M SOLUTION CO,.Ltd"

Nearby in the registry

The prefixes assigned immediately before and after 48:81:4E:

FAQ

Which company owns MAC address prefix 48:81:4E?: MAC address prefix 48:81:4E is registered to E&M SOLUTION CO,.Ltd in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 48:81:4E has a network interface built by E&M SOLUTION CO,.Ltd.
What is the OUI 48:81:4E?: 48:81:4E is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to E&M SOLUTION CO,.Ltd. It covers every address from 48:81:4E:00:00:00 to 48:81:4E:FF:FF:FF, or 16,777,216 addresses in total. It is also written 48-81-4E.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 48:81:4E:00:00:00 that is 48:81:4E — 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 E&M SOLUTION CO,.Ltd located?: E&M SOLUTION CO,.Ltd is listed at #813-ho, 555, Byeolmang-ro Ansan-si Danwon-gu KR 15434 in the IEEE OUI registry entry for 48:81:4E. This is the address the organization registered with the IEEE, which may differ from its current operating address.