Which company owns MAC address prefix 40:B7:FC?

MAC address prefix 40:B7:FC is registered to Phyplus Microelectronics Limited in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 40:B7:FC has a network interface built by Phyplus Microelectronics Limited.

What is the OUI 40:B7:FC?

40:B7:FC is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Phyplus Microelectronics Limited. It covers every address from 40:B7:FC:00:00:00 to 40:B7:FC:FF:FF:FF, or 16,777,216 addresses in total. It is also written 40-B7-FC.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 40:B7:FC:00:00:00 that is 40:B7:FC — 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 Microelectronics Limited located?

Phyplus Microelectronics Limited is listed at 304 Building 1 No.608 Sheng Xia Road Shanghai CN 200000 in the IEEE OUI registry entry for 40:B7:FC. This is the address the organization registered with the IEEE, which may differ from its current operating address.

How many MAC prefixes does Phyplus Microelectronics Limited own?

Phyplus Microelectronics Limited holds 5 OUI prefixes in the IEEE registry, of which 40:B7:FC is one. A device made by Phyplus Microelectronics Limited could carry a MAC address from any of them.

Phyplus Microelectronics Limited

MAC address prefix 40:B7:FC is registered to Phyplus Microelectronics Limited in the IEEE OUI registry. Any device whose MAC address begins with 40:B7:FC has a network interface built by Phyplus Microelectronics Limited. 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:B7:FC:00:00:00 to 40:B7:FC:FF:FF:FF.

OUI prefix: 40:B7:FC
Hyphen form: 40-B7-FC
MAC range: 40:B7:FC:00:00:00 – 40:B7:FC:FF:FF:FF
Addresses in block: 16,777,216
Organization: Phyplus Microelectronics Limited
Address: 304 Building 1 No.608 Sheng Xia Road Shanghai CN 200000
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 Microelectronics Limited

Phyplus Microelectronics Limited holds 5 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.

2026-07-17Assigned to "Phyplus Microelectronics Limited"

Nearby in the registry

The prefixes assigned immediately before and after 40:B7:FC:

FAQ

Which company owns MAC address prefix 40:B7:FC?: MAC address prefix 40:B7:FC is registered to Phyplus Microelectronics Limited in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 40:B7:FC has a network interface built by Phyplus Microelectronics Limited.
What is the OUI 40:B7:FC?: 40:B7:FC is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Phyplus Microelectronics Limited. It covers every address from 40:B7:FC:00:00:00 to 40:B7:FC:FF:FF:FF, or 16,777,216 addresses in total. It is also written 40-B7-FC.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 40:B7:FC:00:00:00 that is 40:B7:FC — 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 Microelectronics Limited located?: Phyplus Microelectronics Limited is listed at 304 Building 1 No.608 Sheng Xia Road Shanghai CN 200000 in the IEEE OUI registry entry for 40:B7:FC. This is the address the organization registered with the IEEE, which may differ from its current operating address.
How many MAC prefixes does Phyplus Microelectronics Limited own?: Phyplus Microelectronics Limited holds 5 OUI prefixes in the IEEE registry, of which 40:B7:FC is one. A device made by Phyplus Microelectronics Limited could carry a MAC address from any of them.