Which company owns MAC address prefix F8:91:F5?

MAC address prefix F8:91:F5 is registered to Dingtian Technologies Co., Ltd in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with F8:91:F5 has a network interface built by Dingtian Technologies Co., Ltd.

What is the OUI F8:91:F5?

F8:91:F5 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Dingtian Technologies Co., Ltd. It covers every address from F8:91:F5:00:00:00 to F8:91:F5:FF:FF:FF, or 16,777,216 addresses in total. It is also written F8-91-F5.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in F8:91:F5:00:00:00 that is F8:91:F5 — 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 Dingtian Technologies Co., Ltd located?

Dingtian Technologies Co., Ltd is listed at Rm.3306, Building6, Runyueshan, No.33 Huangzhukeng Rd.,Biling Street,Pingshan District Shenzhen Guangdong CN 518100 in the IEEE OUI registry entry for F8:91:F5. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Dingtian Technologies Co., Ltd

MAC address prefix F8:91:F5 is registered to Dingtian Technologies Co., Ltd in the IEEE OUI registry. Any device whose MAC address begins with F8:91:F5 has a network interface built by Dingtian Technologies 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 F8:91:F5:00:00:00 to F8:91:F5:FF:FF:FF.

OUI prefix: F8:91:F5
Hyphen form: F8-91-F5
MAC range: F8:91:F5:00:00:00 – F8:91:F5:FF:FF:FF
Addresses in block: 16,777,216
Organization: Dingtian Technologies Co., Ltd
Address: Rm.3306, Building6, Runyueshan, No.33 Huangzhukeng Rd.,Biling Street,Pingshan District Shenzhen Guangdong CN 518100
Source: IEEE OUI registry

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Assignment history (2)

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

2026-01-08Assigned to "Dingtian Technologies Co., Ltd"
archived source →
2026-07-17Assigned to "Dingtian Technologies Co., Ltd"

Nearby in the registry

The prefixes assigned immediately before and after F8:91:F5:

FAQ

Which company owns MAC address prefix F8:91:F5?: MAC address prefix F8:91:F5 is registered to Dingtian Technologies Co., Ltd in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with F8:91:F5 has a network interface built by Dingtian Technologies Co., Ltd.
What is the OUI F8:91:F5?: F8:91:F5 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Dingtian Technologies Co., Ltd. It covers every address from F8:91:F5:00:00:00 to F8:91:F5:FF:FF:FF, or 16,777,216 addresses in total. It is also written F8-91-F5.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in F8:91:F5:00:00:00 that is F8:91:F5 — 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 Dingtian Technologies Co., Ltd located?: Dingtian Technologies Co., Ltd is listed at Rm.3306, Building6, Runyueshan, No.33 Huangzhukeng Rd.,Biling Street,Pingshan District Shenzhen Guangdong CN 518100 in the IEEE OUI registry entry for F8:91:F5. This is the address the organization registered with the IEEE, which may differ from its current operating address.