Which company owns MAC address prefix DC:B1:31?

MAC address prefix DC:B1:31 is registered to SHENZHEN HUARUIAN TECHNOLOGY CO.,LTD in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with DC:B1:31 has a network interface built by SHENZHEN HUARUIAN TECHNOLOGY CO.,LTD.

What is the OUI DC:B1:31?

DC:B1:31 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to SHENZHEN HUARUIAN TECHNOLOGY CO.,LTD. It covers every address from DC:B1:31:00:00:00 to DC:B1:31:FF:FF:FF, or 16,777,216 addresses in total. It is also written DC-B1-31.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in DC:B1:31:00:00:00 that is DC:B1:31 — 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 SHENZHEN HUARUIAN TECHNOLOGY CO.,LTD located?

SHENZHEN HUARUIAN TECHNOLOGY CO.,LTD is listed at Floo2nd and 3rd floor, building A, Huixin Industrial Park, No.31 Yonghe Road, Heping community, Fuhai street, Bao'an District, Shenzhen, China Shenzhen Guangdong CN 518101 in the IEEE OUI registry entry for DC:B1:31. This is the address the organization registered with the IEEE, which may differ from its current operating address.

SHENZHEN HUARUIAN TECHNOLOGY CO.,LTD

MAC address prefix DC:B1:31 is registered to SHENZHEN HUARUIAN TECHNOLOGY CO.,LTD in the IEEE OUI registry. Any device whose MAC address begins with DC:B1:31 has a network interface built by SHENZHEN HUARUIAN 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 DC:B1:31:00:00:00 to DC:B1:31:FF:FF:FF.

OUI prefix: DC:B1:31
Hyphen form: DC-B1-31
MAC range: DC:B1:31:00:00:00 – DC:B1:31:FF:FF:FF
Addresses in block: 16,777,216
Organization: SHENZHEN HUARUIAN TECHNOLOGY CO.,LTD
Address: Floo2nd and 3rd floor, building A, Huixin Industrial Park, No.31 Yonghe Road, Heping community, Fuhai street, Bao'an District, Shenzhen, China Shenzhen Guangdong CN 518101
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.

2021-02-25Assigned to "SHENZHEN HUARUIAN TECHNOLOGY CO.,LTD"
archived source →
2026-07-17Assigned to "SHENZHEN HUARUIAN TECHNOLOGY CO.,LTD"

Nearby in the registry

The prefixes assigned immediately before and after DC:B1:31:

FAQ

Which company owns MAC address prefix DC:B1:31?: MAC address prefix DC:B1:31 is registered to SHENZHEN HUARUIAN TECHNOLOGY CO.,LTD in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with DC:B1:31 has a network interface built by SHENZHEN HUARUIAN TECHNOLOGY CO.,LTD.
What is the OUI DC:B1:31?: DC:B1:31 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to SHENZHEN HUARUIAN TECHNOLOGY CO.,LTD. It covers every address from DC:B1:31:00:00:00 to DC:B1:31:FF:FF:FF, or 16,777,216 addresses in total. It is also written DC-B1-31.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in DC:B1:31:00:00:00 that is DC:B1:31 — 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 SHENZHEN HUARUIAN TECHNOLOGY CO.,LTD located?: SHENZHEN HUARUIAN TECHNOLOGY CO.,LTD is listed at Floo2nd and 3rd floor, building A, Huixin Industrial Park, No.31 Yonghe Road, Heping community, Fuhai street, Bao'an District, Shenzhen, China Shenzhen Guangdong CN 518101 in the IEEE OUI registry entry for DC:B1:31. This is the address the organization registered with the IEEE, which may differ from its current operating address.