Which company owns MAC address prefix 04:D7:83?

MAC address prefix 04:D7:83 is registered to Y&H E&C Co.,LTD. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 04:D7:83 has a network interface built by Y&H E&C Co.,LTD..

What is the OUI 04:D7:83?

04:D7:83 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Y&H E&C Co.,LTD.. It covers every address from 04:D7:83:00:00:00 to 04:D7:83:FF:FF:FF, or 16,777,216 addresses in total. It is also written 04-D7-83.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 04:D7:83:00:00:00 that is 04:D7:83 — 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 Y&H E&C Co.,LTD. located?

Y&H E&C Co.,LTD. is listed at 1501 Daerung Technotown 224-5 Anyang-city Gyeonggi-do KR 431-062 in the IEEE OUI registry entry for 04:D7:83. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Y&H E&C Co.,LTD.

MAC address prefix 04:D7:83 is registered to Y&H E&C Co.,LTD. in the IEEE OUI registry. Any device whose MAC address begins with 04:D7:83 has a network interface built by Y&H E&C 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 04:D7:83:00:00:00 to 04:D7:83:FF:FF:FF.

OUI prefix: 04:D7:83
Hyphen form: 04-D7-83
MAC range: 04:D7:83:00:00:00 – 04:D7:83:FF:FF:FF
Addresses in block: 16,777,216
Organization: Y&H E&C Co.,LTD.
Address: 1501 Daerung Technotown 224-5 Anyang-city Gyeonggi-do KR 431-062
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 "Y&H E&C Co.,LTD."
archived source →
2026-07-17Assigned to "Y&H E&C Co.,LTD."

Nearby in the registry

The prefixes assigned immediately before and after 04:D7:83:

FAQ

Which company owns MAC address prefix 04:D7:83?: MAC address prefix 04:D7:83 is registered to Y&H E&C Co.,LTD. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 04:D7:83 has a network interface built by Y&H E&C Co.,LTD..
What is the OUI 04:D7:83?: 04:D7:83 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Y&H E&C Co.,LTD.. It covers every address from 04:D7:83:00:00:00 to 04:D7:83:FF:FF:FF, or 16,777,216 addresses in total. It is also written 04-D7-83.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 04:D7:83:00:00:00 that is 04:D7:83 — 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 Y&H E&C Co.,LTD. located?: Y&H E&C Co.,LTD. is listed at 1501 Daerung Technotown 224-5 Anyang-city Gyeonggi-do KR 431-062 in the IEEE OUI registry entry for 04:D7:83. This is the address the organization registered with the IEEE, which may differ from its current operating address.