Which company owns MAC address prefix 98:5F:4F?

MAC address prefix 98:5F:4F is registered to Tongfang Computer Co.,Ltd. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 98:5F:4F has a network interface built by Tongfang Computer Co.,Ltd..

What is the OUI 98:5F:4F?

98:5F:4F is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Tongfang Computer Co.,Ltd.. It covers every address from 98:5F:4F:00:00:00 to 98:5F:4F:FF:FF:FF, or 16,777,216 addresses in total. It is also written 98-5F-4F.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 98:5F:4F:00:00:00 that is 98:5F:4F — 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 Tongfang Computer Co.,Ltd. located?

Tongfang Computer Co.,Ltd. is listed at No. 118, Chunsun East Road, Xishan Economic Development Zone (Dongting) Wuxi Jiangsu CN 214101 in the IEEE OUI registry entry for 98:5F:4F. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Tongfang Computer Co.,Ltd.

MAC address prefix 98:5F:4F is registered to Tongfang Computer Co.,Ltd. in the IEEE OUI registry. Any device whose MAC address begins with 98:5F:4F has a network interface built by Tongfang Computer 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 98:5F:4F:00:00:00 to 98:5F:4F:FF:FF:FF.

OUI prefix: 98:5F:4F
Hyphen form: 98-5F-4F
MAC range: 98:5F:4F:00:00:00 – 98:5F:4F:FF:FF:FF
Addresses in block: 16,777,216
Organization: Tongfang Computer Co.,Ltd.
Address: No. 118, Chunsun East Road, Xishan Economic Development Zone (Dongting) Wuxi Jiangsu CN 214101
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.

2022-07-11Assigned to "Tongfang Computer Co.,Ltd."
archived source →
2026-07-17Assigned to "Tongfang Computer Co.,Ltd."

Nearby in the registry

The prefixes assigned immediately before and after 98:5F:4F:

FAQ

Which company owns MAC address prefix 98:5F:4F?: MAC address prefix 98:5F:4F is registered to Tongfang Computer Co.,Ltd. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 98:5F:4F has a network interface built by Tongfang Computer Co.,Ltd..
What is the OUI 98:5F:4F?: 98:5F:4F is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Tongfang Computer Co.,Ltd.. It covers every address from 98:5F:4F:00:00:00 to 98:5F:4F:FF:FF:FF, or 16,777,216 addresses in total. It is also written 98-5F-4F.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 98:5F:4F:00:00:00 that is 98:5F:4F — 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 Tongfang Computer Co.,Ltd. located?: Tongfang Computer Co.,Ltd. is listed at No. 118, Chunsun East Road, Xishan Economic Development Zone (Dongting) Wuxi Jiangsu CN 214101 in the IEEE OUI registry entry for 98:5F:4F. This is the address the organization registered with the IEEE, which may differ from its current operating address.