Which company owns MAC address prefix 40:64:DC?

MAC address prefix 40:64:DC is registered to X-speed lnformation Technology Co.,Ltd in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 40:64:DC has a network interface built by X-speed lnformation Technology Co.,Ltd.

What is the OUI 40:64:DC?

40:64:DC is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to X-speed lnformation Technology Co.,Ltd. It covers every address from 40:64:DC:00:00:00 to 40:64:DC:FF:FF:FF, or 16,777,216 addresses in total. It is also written 40-64-DC.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 40:64:DC:00:00:00 that is 40:64:DC — 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 X-speed lnformation Technology Co.,Ltd located?

X-speed lnformation Technology Co.,Ltd is listed at th Floor,Building 2,Xinyu Electronic Industrial Park,No.69, Zhaishan,Houshan Village, High-tech Zone,Fuzhou,Fujian ,China Fuzhou CN 350000 in the IEEE OUI registry entry for 40:64:DC. This is the address the organization registered with the IEEE, which may differ from its current operating address.

X-speed lnformation Technology Co.,Ltd

MAC address prefix 40:64:DC is registered to X-speed lnformation Technology Co.,Ltd in the IEEE OUI registry. Any device whose MAC address begins with 40:64:DC has a network interface built by X-speed lnformation Technology 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 40:64:DC:00:00:00 to 40:64:DC:FF:FF:FF.

OUI prefix: 40:64:DC
Hyphen form: 40-64-DC
MAC range: 40:64:DC:00:00:00 – 40:64:DC:FF:FF:FF
Addresses in block: 16,777,216
Organization: X-speed lnformation Technology Co.,Ltd
Address: th Floor,Building 2,Xinyu Electronic Industrial Park,No.69, Zhaishan,Houshan Village, High-tech Zone,Fuzhou,Fujian ,China Fuzhou CN 350000
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.

2024-02-15Assigned to "X-speed lnformation Technology Co.,Ltd"
archived source →
2026-07-17Assigned to "X-speed lnformation Technology Co.,Ltd"

Nearby in the registry

The prefixes assigned immediately before and after 40:64:DC:

FAQ

Which company owns MAC address prefix 40:64:DC?: MAC address prefix 40:64:DC is registered to X-speed lnformation Technology Co.,Ltd in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 40:64:DC has a network interface built by X-speed lnformation Technology Co.,Ltd.
What is the OUI 40:64:DC?: 40:64:DC is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to X-speed lnformation Technology Co.,Ltd. It covers every address from 40:64:DC:00:00:00 to 40:64:DC:FF:FF:FF, or 16,777,216 addresses in total. It is also written 40-64-DC.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 40:64:DC:00:00:00 that is 40:64:DC — 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 X-speed lnformation Technology Co.,Ltd located?: X-speed lnformation Technology Co.,Ltd is listed at th Floor,Building 2,Xinyu Electronic Industrial Park,No.69, Zhaishan,Houshan Village, High-tech Zone,Fuzhou,Fujian ,China Fuzhou CN 350000 in the IEEE OUI registry entry for 40:64:DC. This is the address the organization registered with the IEEE, which may differ from its current operating address.