Which company owns MAC address prefix D0:5B:CB?

MAC address prefix D0:5B:CB is registered to Tianyi Telecom Terminals Company Limited in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with D0:5B:CB has a network interface built by Tianyi Telecom Terminals Company Limited.

What is the OUI D0:5B:CB?

D0:5B:CB is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Tianyi Telecom Terminals Company Limited. It covers every address from D0:5B:CB:00:00:00 to D0:5B:CB:FF:FF:FF, or 16,777,216 addresses in total. It is also written D0-5B-CB.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in D0:5B:CB:00:00:00 that is D0:5B:CB — 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 Tianyi Telecom Terminals Company Limited located?

Tianyi Telecom Terminals Company Limited is listed at 2F,No. 31, Jinrong Street, Xicheng District,Beijing Beijing Beijing CN 100073 in the IEEE OUI registry entry for D0:5B:CB. This is the address the organization registered with the IEEE, which may differ from its current operating address.

How many MAC prefixes does Tianyi Telecom Terminals Company Limited own?

Tianyi Telecom Terminals Company Limited holds 9 OUI prefixes in the IEEE registry, of which D0:5B:CB is one. A device made by Tianyi Telecom Terminals Company Limited could carry a MAC address from any of them.

Tianyi Telecom Terminals Company Limited

MAC address prefix D0:5B:CB is registered to Tianyi Telecom Terminals Company Limited in the IEEE OUI registry. Any device whose MAC address begins with D0:5B:CB has a network interface built by Tianyi Telecom Terminals Company 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 D0:5B:CB:00:00:00 to D0:5B:CB:FF:FF:FF.

OUI prefix: D0:5B:CB
Hyphen form: D0-5B-CB
MAC range: D0:5B:CB:00:00:00 – D0:5B:CB:FF:FF:FF
Addresses in block: 16,777,216
Organization: Tianyi Telecom Terminals Company Limited
Address: 2F,No. 31, Jinrong Street, Xicheng District,Beijing Beijing Beijing CN 100073
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 Tianyi Telecom Terminals Company Limited

Tianyi Telecom Terminals Company Limited 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.

2024-02-15Assigned to "Tianyi Telecom Terminals Company Limited"
archived source →
2026-07-17Assigned to "Tianyi Telecom Terminals Company Limited"

Nearby in the registry

The prefixes assigned immediately before and after D0:5B:CB:

FAQ

Which company owns MAC address prefix D0:5B:CB?: MAC address prefix D0:5B:CB is registered to Tianyi Telecom Terminals Company Limited in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with D0:5B:CB has a network interface built by Tianyi Telecom Terminals Company Limited.
What is the OUI D0:5B:CB?: D0:5B:CB is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Tianyi Telecom Terminals Company Limited. It covers every address from D0:5B:CB:00:00:00 to D0:5B:CB:FF:FF:FF, or 16,777,216 addresses in total. It is also written D0-5B-CB.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in D0:5B:CB:00:00:00 that is D0:5B:CB — 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 Tianyi Telecom Terminals Company Limited located?: Tianyi Telecom Terminals Company Limited is listed at 2F,No. 31, Jinrong Street, Xicheng District,Beijing Beijing Beijing CN 100073 in the IEEE OUI registry entry for D0:5B:CB. This is the address the organization registered with the IEEE, which may differ from its current operating address.
How many MAC prefixes does Tianyi Telecom Terminals Company Limited own?: Tianyi Telecom Terminals Company Limited holds 9 OUI prefixes in the IEEE registry, of which D0:5B:CB is one. A device made by Tianyi Telecom Terminals Company Limited could carry a MAC address from any of them.