Which company owns MAC address prefix B0:25:AA?

MAC address prefix B0:25:AA is registered to AIstone Global Limited in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with B0:25:AA has a network interface built by AIstone Global Limited.

What is the OUI B0:25:AA?

B0:25:AA is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to AIstone Global Limited. It covers every address from B0:25:AA:00:00:00 to B0:25:AA:FF:FF:FF, or 16,777,216 addresses in total. It is also written B0-25-AA.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in B0:25:AA:00:00:00 that is B0:25:AA — 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 AIstone Global Limited located?

AIstone Global Limited is listed at 29/F. , One Exchange Square 8 Connaught Place Centa Hong Kong CN 999077 in the IEEE OUI registry entry for B0:25:AA. This is the address the organization registered with the IEEE, which may differ from its current operating address.

AIstone Global Limited

MAC address prefix B0:25:AA is registered to AIstone Global Limited in the IEEE OUI registry. Any device whose MAC address begins with B0:25:AA has a network interface built by AIstone Global Limited. 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 B0:25:AA:00:00:00 to B0:25:AA:FF:FF:FF.

OUI prefix: B0:25:AA
Hyphen form: B0-25-AA
MAC range: B0:25:AA:00:00:00 – B0:25:AA:FF:FF:FF
Addresses in block: 16,777,216
Organization: AIstone Global Limited
Address: 29/F. , One Exchange Square 8 Connaught Place Centa Hong Kong CN 999077
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 (3)

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 "Private"
archived source →
2025-08-23Renamed from "Private" to "AIstone Global Limited"
archived source →
2026-07-17Assigned to "AIstone Global Limited"

Nearby in the registry

The prefixes assigned immediately before and after B0:25:AA:

FAQ

Which company owns MAC address prefix B0:25:AA?: MAC address prefix B0:25:AA is registered to AIstone Global Limited in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with B0:25:AA has a network interface built by AIstone Global Limited.
What is the OUI B0:25:AA?: B0:25:AA is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to AIstone Global Limited. It covers every address from B0:25:AA:00:00:00 to B0:25:AA:FF:FF:FF, or 16,777,216 addresses in total. It is also written B0-25-AA.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in B0:25:AA:00:00:00 that is B0:25:AA — 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 AIstone Global Limited located?: AIstone Global Limited is listed at 29/F. , One Exchange Square 8 Connaught Place Centa Hong Kong CN 999077 in the IEEE OUI registry entry for B0:25:AA. This is the address the organization registered with the IEEE, which may differ from its current operating address.