Which company owns MAC address prefix A0:90:B5?

MAC address prefix A0:90:B5 is registered to Tiinlab Corporation in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with A0:90:B5 has a network interface built by Tiinlab Corporation.

What is the OUI A0:90:B5?

A0:90:B5 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Tiinlab Corporation. It covers every address from A0:90:B5:00:00:00 to A0:90:B5:FF:FF:FF, or 16,777,216 addresses in total. It is also written A0-90-B5.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in A0:90:B5:00:00:00 that is A0:90:B5 — 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 Tiinlab Corporation located?

Tiinlab Corporation is listed at Building A Room 201 Cooperation District between Shenzhen and HongKong,Qianwan Road No.1,Shenzhen City, Business Address:No. 3333, Liuxian AvenueTower A, 35th Floor,Tanglang City, Nanshan District, Shenzhen, China Shenzhen Guangdong CN 518000 in the IEEE OUI registry entry for A0:90:B5. This is the address the organization registered with the IEEE, which may differ from its current operating address.

How many MAC prefixes does Tiinlab Corporation own?

Tiinlab Corporation holds 9 OUI prefixes in the IEEE registry, of which A0:90:B5 is one. A device made by Tiinlab Corporation could carry a MAC address from any of them.

Tiinlab Corporation

MAC address prefix A0:90:B5 is registered to Tiinlab Corporation in the IEEE OUI registry. Any device whose MAC address begins with A0:90:B5 has a network interface built by Tiinlab Corporation. 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 A0:90:B5:00:00:00 to A0:90:B5:FF:FF:FF.

OUI prefix: A0:90:B5
Hyphen form: A0-90-B5
MAC range: A0:90:B5:00:00:00 – A0:90:B5:FF:FF:FF
Addresses in block: 16,777,216
Organization: Tiinlab Corporation
Address: Building A Room 201 Cooperation District between Shenzhen and HongKong,Qianwan Road No.1,Shenzhen City, Business Address:No. 3333, Liuxian AvenueTower A, 35th Floor,Tanglang City, Nanshan District, Shenzhen, China Shenzhen Guangdong CN 518000
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 Tiinlab Corporation

Tiinlab Corporation holds 9 OUI prefixes in total. A device with this exact prefix could just as well carry any of these:

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 "Tiinlab Corporation"
archived source →
2026-07-17Assigned to "Tiinlab Corporation"

Nearby in the registry

The prefixes assigned immediately before and after A0:90:B5:

FAQ

Which company owns MAC address prefix A0:90:B5?: MAC address prefix A0:90:B5 is registered to Tiinlab Corporation in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with A0:90:B5 has a network interface built by Tiinlab Corporation.
What is the OUI A0:90:B5?: A0:90:B5 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Tiinlab Corporation. It covers every address from A0:90:B5:00:00:00 to A0:90:B5:FF:FF:FF, or 16,777,216 addresses in total. It is also written A0-90-B5.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in A0:90:B5:00:00:00 that is A0:90:B5 — 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 Tiinlab Corporation located?: Tiinlab Corporation is listed at Building A Room 201 Cooperation District between Shenzhen and HongKong,Qianwan Road No.1,Shenzhen City, Business Address:No. 3333, Liuxian AvenueTower A, 35th Floor,Tanglang City, Nanshan District, Shenzhen, China Shenzhen Guangdong CN 518000 in the IEEE OUI registry entry for A0:90:B5. This is the address the organization registered with the IEEE, which may differ from its current operating address.
How many MAC prefixes does Tiinlab Corporation own?: Tiinlab Corporation holds 9 OUI prefixes in the IEEE registry, of which A0:90:B5 is one. A device made by Tiinlab Corporation could carry a MAC address from any of them.