Which company owns MAC address prefix E8:DE:00?

MAC address prefix E8:DE:00 is registered to ChongQing GuanFang Technology Co.,LTD in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with E8:DE:00 has a network interface built by ChongQing GuanFang Technology Co.,LTD.

What is the OUI E8:DE:00?

E8:DE:00 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to ChongQing GuanFang Technology Co.,LTD. It covers every address from E8:DE:00:00:00:00 to E8:DE:00:FF:FF:FF, or 16,777,216 addresses in total. It is also written E8-DE-00.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in E8:DE:00:00:00:00 that is E8:DE:00 — 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 ChongQing GuanFang Technology Co.,LTD located?

ChongQing GuanFang Technology Co.,LTD is listed at 2F, A District,No.3 Middle Section of Mount Huangshan Avenue ChongQing ChongQing CN 401121 in the IEEE OUI registry entry for E8:DE:00. This is the address the organization registered with the IEEE, which may differ from its current operating address.

ChongQing GuanFang Technology Co.,LTD

MAC address prefix E8:DE:00 is registered to ChongQing GuanFang Technology Co.,LTD in the IEEE OUI registry. Any device whose MAC address begins with E8:DE:00 has a network interface built by ChongQing GuanFang 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 E8:DE:00:00:00:00 to E8:DE:00:FF:FF:FF.

OUI prefix: E8:DE:00
Hyphen form: E8-DE-00
MAC range: E8:DE:00:00:00:00 – E8:DE:00:FF:FF:FF
Addresses in block: 16,777,216
Organization: ChongQing GuanFang Technology Co.,LTD
Address: 2F, A District,No.3 Middle Section of Mount Huangshan Avenue ChongQing ChongQing CN 401121
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.

2018-12-21Assigned to "ChongQing GuanFang Technology Co.,LTD"
archived source →
2026-07-17Assigned to "ChongQing GuanFang Technology Co.,LTD"

Nearby in the registry

The prefixes assigned immediately before and after E8:DE:00:

FAQ

Which company owns MAC address prefix E8:DE:00?: MAC address prefix E8:DE:00 is registered to ChongQing GuanFang Technology Co.,LTD in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with E8:DE:00 has a network interface built by ChongQing GuanFang Technology Co.,LTD.
What is the OUI E8:DE:00?: E8:DE:00 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to ChongQing GuanFang Technology Co.,LTD. It covers every address from E8:DE:00:00:00:00 to E8:DE:00:FF:FF:FF, or 16,777,216 addresses in total. It is also written E8-DE-00.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in E8:DE:00:00:00:00 that is E8:DE:00 — 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 ChongQing GuanFang Technology Co.,LTD located?: ChongQing GuanFang Technology Co.,LTD is listed at 2F, A District,No.3 Middle Section of Mount Huangshan Avenue ChongQing ChongQing CN 401121 in the IEEE OUI registry entry for E8:DE:00. This is the address the organization registered with the IEEE, which may differ from its current operating address.