Which company owns MAC address prefix 38:F2:5D?

MAC address prefix 38:F2:5D is registered to Hangzhou Ezviz Software Co.,Ltd. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 38:F2:5D has a network interface built by Hangzhou Ezviz Software Co.,Ltd..

What is the OUI 38:F2:5D?

38:F2:5D is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Hangzhou Ezviz Software Co.,Ltd.. It covers every address from 38:F2:5D:00:00:00 to 38:F2:5D:FF:FF:FF, or 16,777,216 addresses in total. It is also written 38-F2-5D.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 38:F2:5D:00:00:00 that is 38:F2:5D — 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 Hangzhou Ezviz Software Co.,Ltd. located?

Hangzhou Ezviz Software Co.,Ltd. is listed at 17th Floor, Building D, No.188 Qizhi East Stree, Xixing Subdistrict, Binjiang District Hangzhou Zhejiang CN 310051 in the IEEE OUI registry entry for 38:F2:5D. This is the address the organization registered with the IEEE, which may differ from its current operating address.

How many MAC prefixes does Hangzhou Ezviz Software Co.,Ltd. own?

Hangzhou Ezviz Software Co.,Ltd. holds 14 OUI prefixes in the IEEE registry, of which 38:F2:5D is one. A device made by Hangzhou Ezviz Software Co.,Ltd. could carry a MAC address from any of them.

Hangzhou Ezviz Software Co.,Ltd.

MAC address prefix 38:F2:5D is registered to Hangzhou Ezviz Software Co.,Ltd. in the IEEE OUI registry. Any device whose MAC address begins with 38:F2:5D has a network interface built by Hangzhou Ezviz Software 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 38:F2:5D:00:00:00 to 38:F2:5D:FF:FF:FF.

OUI prefix: 38:F2:5D
Hyphen form: 38-F2-5D
MAC range: 38:F2:5D:00:00:00 – 38:F2:5D:FF:FF:FF
Addresses in block: 16,777,216
Organization: Hangzhou Ezviz Software Co.,Ltd.
Address: 17th Floor, Building D, No.188 Qizhi East Stree, Xixing Subdistrict, Binjiang District Hangzhou Zhejiang CN 310051
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 Hangzhou Ezviz Software Co.,Ltd.

Hangzhou Ezviz Software Co.,Ltd. holds 14 OUI prefixes in total. A device with this exact prefix could just as well carry any of these:

Assignment history (1)

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

2026-08-15Assigned to "Hangzhou Ezviz Software Co.,Ltd."

Nearby in the registry

The prefixes assigned immediately before and after 38:F2:5D:

FAQ

Which company owns MAC address prefix 38:F2:5D?: MAC address prefix 38:F2:5D is registered to Hangzhou Ezviz Software Co.,Ltd. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 38:F2:5D has a network interface built by Hangzhou Ezviz Software Co.,Ltd..
What is the OUI 38:F2:5D?: 38:F2:5D is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Hangzhou Ezviz Software Co.,Ltd.. It covers every address from 38:F2:5D:00:00:00 to 38:F2:5D:FF:FF:FF, or 16,777,216 addresses in total. It is also written 38-F2-5D.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 38:F2:5D:00:00:00 that is 38:F2:5D — 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 Hangzhou Ezviz Software Co.,Ltd. located?: Hangzhou Ezviz Software Co.,Ltd. is listed at 17th Floor, Building D, No.188 Qizhi East Stree, Xixing Subdistrict, Binjiang District Hangzhou Zhejiang CN 310051 in the IEEE OUI registry entry for 38:F2:5D. This is the address the organization registered with the IEEE, which may differ from its current operating address.
How many MAC prefixes does Hangzhou Ezviz Software Co.,Ltd. own?: Hangzhou Ezviz Software Co.,Ltd. holds 14 OUI prefixes in the IEEE registry, of which 38:F2:5D is one. A device made by Hangzhou Ezviz Software Co.,Ltd. could carry a MAC address from any of them.