Which company owns MAC address prefix A4:6D:33?

MAC address prefix A4:6D:33 is registered to Phyplus Technology (Shanghai) Co., Ltd in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with A4:6D:33 has a network interface built by Phyplus Technology (Shanghai) Co., Ltd.

What is the OUI A4:6D:33?

A4:6D:33 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Phyplus Technology (Shanghai) Co., Ltd. It covers every address from A4:6D:33:00:00:00 to A4:6D:33:FF:FF:FF, or 16,777,216 addresses in total. It is also written A4-6D-33.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in A4:6D:33:00:00:00 that is A4:6D:33 — 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 Phyplus Technology (Shanghai) Co., Ltd located?

Phyplus Technology (Shanghai) Co., Ltd is listed at 3th Floor, Building 23, 676 Wuxing Road, Pudong New District, Shanghai Shanghai Shanghai CN 201204 in the IEEE OUI registry entry for A4:6D:33. This is the address the organization registered with the IEEE, which may differ from its current operating address.

How many MAC prefixes does Phyplus Technology (Shanghai) Co., Ltd own?

Phyplus Technology (Shanghai) Co., Ltd holds 5 OUI prefixes in the IEEE registry, of which A4:6D:33 is one. A device made by Phyplus Technology (Shanghai) Co., Ltd could carry a MAC address from any of them.

Phyplus Technology (Shanghai) Co., Ltd

MAC address prefix A4:6D:33 is registered to Phyplus Technology (Shanghai) Co., Ltd in the IEEE OUI registry. Any device whose MAC address begins with A4:6D:33 has a network interface built by Phyplus Technology (Shanghai) 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 A4:6D:33:00:00:00 to A4:6D:33:FF:FF:FF.

OUI prefix: A4:6D:33
Hyphen form: A4-6D-33
MAC range: A4:6D:33:00:00:00 – A4:6D:33:FF:FF:FF
Addresses in block: 16,777,216
Organization: Phyplus Technology (Shanghai) Co., Ltd
Address: 3th Floor, Building 23, 676 Wuxing Road, Pudong New District, Shanghai Shanghai Shanghai CN 201204
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 Phyplus Technology (Shanghai) Co., Ltd

Phyplus Technology (Shanghai) Co., Ltd holds 5 OUI prefixes in total. A device with this exact prefix could just as well carry any of these:

Assignment history (2)

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

2024-11-20Assigned to "Phyplus Technology (Shanghai) Co., Ltd"
archived source →
2026-07-17Assigned to "Phyplus Technology (Shanghai) Co., Ltd"

Nearby in the registry

The prefixes assigned immediately before and after A4:6D:33:

FAQ

Which company owns MAC address prefix A4:6D:33?: MAC address prefix A4:6D:33 is registered to Phyplus Technology (Shanghai) Co., Ltd in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with A4:6D:33 has a network interface built by Phyplus Technology (Shanghai) Co., Ltd.
What is the OUI A4:6D:33?: A4:6D:33 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Phyplus Technology (Shanghai) Co., Ltd. It covers every address from A4:6D:33:00:00:00 to A4:6D:33:FF:FF:FF, or 16,777,216 addresses in total. It is also written A4-6D-33.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in A4:6D:33:00:00:00 that is A4:6D:33 — 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 Phyplus Technology (Shanghai) Co., Ltd located?: Phyplus Technology (Shanghai) Co., Ltd is listed at 3th Floor, Building 23, 676 Wuxing Road, Pudong New District, Shanghai Shanghai Shanghai CN 201204 in the IEEE OUI registry entry for A4:6D:33. This is the address the organization registered with the IEEE, which may differ from its current operating address.
How many MAC prefixes does Phyplus Technology (Shanghai) Co., Ltd own?: Phyplus Technology (Shanghai) Co., Ltd holds 5 OUI prefixes in the IEEE registry, of which A4:6D:33 is one. A device made by Phyplus Technology (Shanghai) Co., Ltd could carry a MAC address from any of them.