Which company owns MAC address prefix 80:61:5F?

MAC address prefix 80:61:5F is registered to Beijing Sinead Technology Co., Ltd. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 80:61:5F has a network interface built by Beijing Sinead Technology Co., Ltd..

What is the OUI 80:61:5F?

80:61:5F is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Beijing Sinead Technology Co., Ltd.. It covers every address from 80:61:5F:00:00:00 to 80:61:5F:FF:FF:FF, or 16,777,216 addresses in total. It is also written 80-61-5F.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 80:61:5F:00:00:00 that is 80:61:5F — 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 Beijing Sinead Technology Co., Ltd. located?

Beijing Sinead Technology Co., Ltd. is listed at Room 504,Block A, New material Building, Yongfeng industrial, Haiding District, Beijing.China Beijing Beijing CN 100094 in the IEEE OUI registry entry for 80:61:5F. This is the address the organization registered with the IEEE, which may differ from its current operating address.

How many MAC prefixes does Beijing Sinead Technology Co., Ltd. own?

Beijing Sinead Technology Co., Ltd. holds 2 OUI prefixes in the IEEE registry, of which 80:61:5F is one. A device made by Beijing Sinead Technology Co., Ltd. could carry a MAC address from any of them.

Beijing Sinead Technology Co., Ltd.

MAC address prefix 80:61:5F is registered to Beijing Sinead Technology Co., Ltd. in the IEEE OUI registry. Any device whose MAC address begins with 80:61:5F has a network interface built by Beijing Sinead 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 80:61:5F:00:00:00 to 80:61:5F:FF:FF:FF.

OUI prefix: 80:61:5F
Hyphen form: 80-61-5F
MAC range: 80:61:5F:00:00:00 – 80:61:5F:FF:FF:FF
Addresses in block: 16,777,216
Organization: Beijing Sinead Technology Co., Ltd.
Address: Room 504,Block A, New material Building, Yongfeng industrial, Haiding District, Beijing.China Beijing Beijing CN 100094
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.

Other prefixes from Beijing Sinead Technology Co., Ltd.

Beijing Sinead Technology Co., Ltd. holds 2 OUI prefixes in total. A device with this exact prefix could just as well carry any of these:

3C:9F:C3

Assignment history (2)

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

2017-09-08Assigned to "Beijing Sinead Technology Co., Ltd."
archived source →
2026-07-17Assigned to "Beijing Sinead Technology Co., Ltd."

Nearby in the registry

The prefixes assigned immediately before and after 80:61:5F:

FAQ

Which company owns MAC address prefix 80:61:5F?: MAC address prefix 80:61:5F is registered to Beijing Sinead Technology Co., Ltd. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 80:61:5F has a network interface built by Beijing Sinead Technology Co., Ltd..
What is the OUI 80:61:5F?: 80:61:5F is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Beijing Sinead Technology Co., Ltd.. It covers every address from 80:61:5F:00:00:00 to 80:61:5F:FF:FF:FF, or 16,777,216 addresses in total. It is also written 80-61-5F.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 80:61:5F:00:00:00 that is 80:61:5F — 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 Beijing Sinead Technology Co., Ltd. located?: Beijing Sinead Technology Co., Ltd. is listed at Room 504,Block A, New material Building, Yongfeng industrial, Haiding District, Beijing.China Beijing Beijing CN 100094 in the IEEE OUI registry entry for 80:61:5F. This is the address the organization registered with the IEEE, which may differ from its current operating address.
How many MAC prefixes does Beijing Sinead Technology Co., Ltd. own?: Beijing Sinead Technology Co., Ltd. holds 2 OUI prefixes in the IEEE registry, of which 80:61:5F is one. A device made by Beijing Sinead Technology Co., Ltd. could carry a MAC address from any of them.