Which company owns MAC address prefix 20:EE:C6?

MAC address prefix 20:EE:C6 is registered to Elefirst Science & Tech Co ., ltd in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 20:EE:C6 has a network interface built by Elefirst Science & Tech Co ., ltd.

What is the OUI 20:EE:C6?

20:EE:C6 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Elefirst Science & Tech Co ., ltd. It covers every address from 20:EE:C6:00:00:00 to 20:EE:C6:FF:FF:FF, or 16,777,216 addresses in total. It is also written 20-EE-C6.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 20:EE:C6:00:00:00 that is 20:EE:C6 — 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 Elefirst Science & Tech Co ., ltd located?

Elefirst Science & Tech Co ., ltd is listed at Floor 9, No 77 Zijinmingmen Building Nanjing Jiangsu CN 210007 in the IEEE OUI registry entry for 20:EE:C6. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Elefirst Science & Tech Co ., ltd

MAC address prefix 20:EE:C6 is registered to Elefirst Science & Tech Co ., ltd in the IEEE OUI registry. Any device whose MAC address begins with 20:EE:C6 has a network interface built by Elefirst Science & Tech 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 20:EE:C6:00:00:00 to 20:EE:C6:FF:FF:FF.

OUI prefix: 20:EE:C6
Hyphen form: 20-EE-C6
MAC range: 20:EE:C6:00:00:00 – 20:EE:C6:FF:FF:FF
Addresses in block: 16,777,216
Organization: Elefirst Science & Tech Co ., ltd
Address: Floor 9, No 77 Zijinmingmen Building Nanjing Jiangsu CN 210007
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.

2016-07-29Assigned to "Elefirst Science & Tech Co ., ltd"
archived source →
2026-07-17Assigned to "Elefirst Science & Tech Co ., ltd"

Nearby in the registry

The prefixes assigned immediately before and after 20:EE:C6:

FAQ

Which company owns MAC address prefix 20:EE:C6?: MAC address prefix 20:EE:C6 is registered to Elefirst Science & Tech Co ., ltd in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 20:EE:C6 has a network interface built by Elefirst Science & Tech Co ., ltd.
What is the OUI 20:EE:C6?: 20:EE:C6 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Elefirst Science & Tech Co ., ltd. It covers every address from 20:EE:C6:00:00:00 to 20:EE:C6:FF:FF:FF, or 16,777,216 addresses in total. It is also written 20-EE-C6.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 20:EE:C6:00:00:00 that is 20:EE:C6 — 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 Elefirst Science & Tech Co ., ltd located?: Elefirst Science & Tech Co ., ltd is listed at Floor 9, No 77 Zijinmingmen Building Nanjing Jiangsu CN 210007 in the IEEE OUI registry entry for 20:EE:C6. This is the address the organization registered with the IEEE, which may differ from its current operating address.