Which company owns MAC address prefix 00:21:58?

MAC address prefix 00:21:58 is registered to Style Flying Technology Co. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 00:21:58 has a network interface built by Style Flying Technology Co..

What is the OUI 00:21:58?

00:21:58 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Style Flying Technology Co.. It covers every address from 00:21:58:00:00:00 to 00:21:58:FF:FF:FF, or 16,777,216 addresses in total. It is also written 00-21-58.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 00:21:58:00:00:00 that is 00:21:58 — 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 Style Flying Technology Co. located?

Style Flying Technology Co. is listed at 22/F,Cyber Tower B,No.2 Zhong Guan Cun South Street,Haidian District, Beijing CN 100086 in the IEEE OUI registry entry for 00:21:58. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Style Flying Technology Co.

MAC address prefix 00:21:58 is registered to Style Flying Technology Co. in the IEEE OUI registry. Any device whose MAC address begins with 00:21:58 has a network interface built by Style Flying Technology Co.. 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 00:21:58:00:00:00 to 00:21:58:FF:FF:FF.

OUI prefix: 00:21:58
Hyphen form: 00-21-58
MAC range: 00:21:58:00:00:00 – 00:21:58:FF:FF:FF
Addresses in block: 16,777,216
Organization: Style Flying Technology Co.
Address: 22/F,Cyber Tower B,No.2 Zhong Guan Cun South Street,Haidian District, Beijing CN 100086
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 "Style Flying Technology Co."
archived source →
2026-07-17Assigned to "Style Flying Technology Co."

Nearby in the registry

The prefixes assigned immediately before and after 00:21:58:

FAQ

Which company owns MAC address prefix 00:21:58?: MAC address prefix 00:21:58 is registered to Style Flying Technology Co. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 00:21:58 has a network interface built by Style Flying Technology Co..
What is the OUI 00:21:58?: 00:21:58 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Style Flying Technology Co.. It covers every address from 00:21:58:00:00:00 to 00:21:58:FF:FF:FF, or 16,777,216 addresses in total. It is also written 00-21-58.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 00:21:58:00:00:00 that is 00:21:58 — 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 Style Flying Technology Co. located?: Style Flying Technology Co. is listed at 22/F,Cyber Tower B,No.2 Zhong Guan Cun South Street,Haidian District, Beijing CN 100086 in the IEEE OUI registry entry for 00:21:58. This is the address the organization registered with the IEEE, which may differ from its current operating address.