Which company owns MAC address prefix 18:11:71?

MAC address prefix 18:11:71 is registered to Guangzhou Doctorpai Education & Technology Co.,Ltd in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 18:11:71 has a network interface built by Guangzhou Doctorpai Education & Technology Co.,Ltd.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 18:11:71:00:00:00 that is 18:11:71 — 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.

Guangzhou Doctorpai Education & Technology Co.,Ltd

MAC address prefix 18:11:71 is registered to Guangzhou Doctorpai Education & Technology Co.,Ltd in the IEEE OUI registry. Any device whose MAC address begins with 18:11:71 has a network interface built by Guangzhou Doctorpai Education & 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 18:11:71:00:00:00 to 18:11:71:FF:FF:FF.

OUI prefix: 18:11:71
Hyphen form: 18-11-71
MAC range: 18:11:71:00:00:00 – 18:11:71:FF:FF:FF
Addresses in block: 16,777,216
Organization: Guangzhou Doctorpai Education & Technology Co.,Ltd
Address: Floor 5, Building C1, Greenland Central Plaza Huangpu District, Guangzhou Guangdong Province CN 510700
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.

2020-11-28Assigned to "Guangzhou Doctorpai Education & Technology Co.,Ltd"
archived source →
2026-07-17Assigned to "Guangzhou Doctorpai Education & Technology Co.,Ltd"

Nearby in the registry

The prefixes assigned immediately before and after 18:11:71:

FAQ

Which company owns MAC address prefix 18:11:71?: MAC address prefix 18:11:71 is registered to Guangzhou Doctorpai Education & Technology Co.,Ltd in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 18:11:71 has a network interface built by Guangzhou Doctorpai Education & Technology Co.,Ltd.
What is the OUI 18:11:71?: 18:11:71 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Guangzhou Doctorpai Education & Technology Co.,Ltd. It covers every address from 18:11:71:00:00:00 to 18:11:71:FF:FF:FF, or 16,777,216 addresses in total. It is also written 18-11-71.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 18:11:71:00:00:00 that is 18:11:71 — 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 Guangzhou Doctorpai Education & Technology Co.,Ltd located?: Guangzhou Doctorpai Education & Technology Co.,Ltd is listed at Floor 5, Building C1, Greenland Central Plaza Huangpu District, Guangzhou Guangdong Province CN 510700 in the IEEE OUI registry entry for 18:11:71. This is the address the organization registered with the IEEE, which may differ from its current operating address.