Which company owns MAC address prefix 38:45:8C?

MAC address prefix 38:45:8C is registered to MyCloud Technology corporation in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 38:45:8C has a network interface built by MyCloud Technology corporation.

What is the OUI 38:45:8C?

38:45:8C is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to MyCloud Technology corporation. It covers every address from 38:45:8C:00:00:00 to 38:45:8C:FF:FF:FF, or 16,777,216 addresses in total. It is also written 38-45-8C.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 38:45:8C:00:00:00 that is 38:45:8C — 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 MyCloud Technology corporation located?

MyCloud Technology corporation is listed at Room 705£¬Building F, Jiahua Building£¬ Beijing CN 100085 in the IEEE OUI registry entry for 38:45:8C. This is the address the organization registered with the IEEE, which may differ from its current operating address.

MyCloud Technology corporation

MAC address prefix 38:45:8C is registered to MyCloud Technology corporation in the IEEE OUI registry. Any device whose MAC address begins with 38:45:8C has a network interface built by MyCloud Technology corporation. 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 38:45:8C:00:00:00 to 38:45:8C:FF:FF:FF.

OUI prefix: 38:45:8C
Hyphen form: 38-45-8C
MAC range: 38:45:8C:00:00:00 – 38:45:8C:FF:FF:FF
Addresses in block: 16,777,216
Organization: MyCloud Technology corporation
Address: Room 705£¬Building F, Jiahua Building£¬ Beijing CN 100085
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 "MyCloud Technology corporation"
archived source →
2026-07-17Assigned to "MyCloud Technology corporation"

Nearby in the registry

The prefixes assigned immediately before and after 38:45:8C:

FAQ

Which company owns MAC address prefix 38:45:8C?: MAC address prefix 38:45:8C is registered to MyCloud Technology corporation in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 38:45:8C has a network interface built by MyCloud Technology corporation.
What is the OUI 38:45:8C?: 38:45:8C is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to MyCloud Technology corporation. It covers every address from 38:45:8C:00:00:00 to 38:45:8C:FF:FF:FF, or 16,777,216 addresses in total. It is also written 38-45-8C.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 38:45:8C:00:00:00 that is 38:45:8C — 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 MyCloud Technology corporation located?: MyCloud Technology corporation is listed at Room 705£¬Building F, Jiahua Building£¬ Beijing CN 100085 in the IEEE OUI registry entry for 38:45:8C. This is the address the organization registered with the IEEE, which may differ from its current operating address.