Which company owns MAC address prefix E4:05:F8?

MAC address prefix E4:05:F8 is registered to Bytedance in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with E4:05:F8 has a network interface built by Bytedance.

What is the OUI E4:05:F8?

E4:05:F8 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Bytedance. It covers every address from E4:05:F8:00:00:00 to E4:05:F8:FF:FF:FF, or 16,777,216 addresses in total. It is also written E4-05-F8.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in E4:05:F8:00:00:00 that is E4:05:F8 — 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 Bytedance located?

Bytedance is listed at E World Center,11 Zhongguancun Street Haidian Dist Beijing City Beijing CN 100102 in the IEEE OUI registry entry for E4:05:F8. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Bytedance

MAC address prefix E4:05:F8 is registered to Bytedance in the IEEE OUI registry. Any device whose MAC address begins with E4:05:F8 has a network interface built by Bytedance. 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 E4:05:F8:00:00:00 to E4:05:F8:FF:FF:FF.

OUI prefix: E4:05:F8
Hyphen form: E4-05-F8
MAC range: E4:05:F8:00:00:00 – E4:05:F8:FF:FF:FF
Addresses in block: 16,777,216
Organization: Bytedance
Address: E World Center,11 Zhongguancun Street Haidian Dist Beijing City Beijing CN 100102
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 (3)

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

2019-07-04Assigned to "Delta Innovation Technology Co., Ltd."
archived source →
2021-02-25Renamed from "Delta Innovation Technology Co., Ltd." to "Bytedance"
archived source →
2026-07-17Assigned to "Bytedance"

Nearby in the registry

The prefixes assigned immediately before and after E4:05:F8:

FAQ

Which company owns MAC address prefix E4:05:F8?: MAC address prefix E4:05:F8 is registered to Bytedance in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with E4:05:F8 has a network interface built by Bytedance.
What is the OUI E4:05:F8?: E4:05:F8 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Bytedance. It covers every address from E4:05:F8:00:00:00 to E4:05:F8:FF:FF:FF, or 16,777,216 addresses in total. It is also written E4-05-F8.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in E4:05:F8:00:00:00 that is E4:05:F8 — 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 Bytedance located?: Bytedance is listed at E World Center,11 Zhongguancun Street Haidian Dist Beijing City Beijing CN 100102 in the IEEE OUI registry entry for E4:05:F8. This is the address the organization registered with the IEEE, which may differ from its current operating address.