Which company owns MAC address prefix A8:5A:F3?

MAC address prefix A8:5A:F3 is registered to Shanghai Siflower Communication Technology Co., Ltd in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with A8:5A:F3 has a network interface built by Shanghai Siflower Communication Technology Co., Ltd.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in A8:5A:F3:00:00:00 that is A8:5A:F3 — 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.

Shanghai Siflower Communication Technology Co., Ltd

MAC address prefix A8:5A:F3 is registered to Shanghai Siflower Communication Technology Co., Ltd in the IEEE OUI registry. Any device whose MAC address begins with A8:5A:F3 has a network interface built by Shanghai Siflower Communication 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 A8:5A:F3:00:00:00 to A8:5A:F3:FF:FF:FF.

OUI prefix: A8:5A:F3
Hyphen form: A8-5A-F3
MAC range: A8:5A:F3:00:00:00 – A8:5A:F3:FF:FF:FF
Addresses in block: 16,777,216
Organization: Shanghai Siflower Communication Technology Co., Ltd
Address: Rm. 408, No. 84, Lane 887. Zhangjiang Hi-Tech Park. Zuchongzhi Rd. Shanghai, China Shanghai Shanghai CN 201210
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.

2018-12-21Assigned to "Shanghai Siflower Communication Technology Co., Ltd"
archived source →
2026-07-17Assigned to "Shanghai Siflower Communication Technology Co., Ltd"

Nearby in the registry

The prefixes assigned immediately before and after A8:5A:F3:

FAQ

Which company owns MAC address prefix A8:5A:F3?: MAC address prefix A8:5A:F3 is registered to Shanghai Siflower Communication Technology Co., Ltd in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with A8:5A:F3 has a network interface built by Shanghai Siflower Communication Technology Co., Ltd.
What is the OUI A8:5A:F3?: A8:5A:F3 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Shanghai Siflower Communication Technology Co., Ltd. It covers every address from A8:5A:F3:00:00:00 to A8:5A:F3:FF:FF:FF, or 16,777,216 addresses in total. It is also written A8-5A-F3.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in A8:5A:F3:00:00:00 that is A8:5A:F3 — 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 Shanghai Siflower Communication Technology Co., Ltd located?: Shanghai Siflower Communication Technology Co., Ltd is listed at Rm. 408, No. 84, Lane 887. Zhangjiang Hi-Tech Park. Zuchongzhi Rd. Shanghai, China Shanghai Shanghai CN 201210 in the IEEE OUI registry entry for A8:5A:F3. This is the address the organization registered with the IEEE, which may differ from its current operating address.