Which company owns MAC address prefix B4:0B:44?

MAC address prefix B4:0B:44 is registered to Smartisan Technology Co., Ltd. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with B4:0B:44 has a network interface built by Smartisan Technology Co., Ltd..

What is the OUI B4:0B:44?

B4:0B:44 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Smartisan Technology Co., Ltd.. It covers every address from B4:0B:44:00:00:00 to B4:0B:44:FF:FF:FF, or 16,777,216 addresses in total. It is also written B4-0B-44.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in B4:0B:44:00:00:00 that is B4:0B:44 — 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 Smartisan Technology Co., Ltd. located?

Smartisan Technology Co., Ltd. is listed at 7/F, Motorola Bldg., 1st Wangjing East Rd, Beijing CN 100102 in the IEEE OUI registry entry for B4:0B:44. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Smartisan Technology Co., Ltd.

MAC address prefix B4:0B:44 is registered to Smartisan Technology Co., Ltd. in the IEEE OUI registry. Any device whose MAC address begins with B4:0B:44 has a network interface built by Smartisan 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 B4:0B:44:00:00:00 to B4:0B:44:FF:FF:FF.

OUI prefix: B4:0B:44
Hyphen form: B4-0B-44
MAC range: B4:0B:44:00:00:00 – B4:0B:44:FF:FF:FF
Addresses in block: 16,777,216
Organization: Smartisan Technology Co., Ltd.
Address: 7/F, Motorola Bldg., 1st Wangjing East Rd, Beijing CN 100102
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.

2016-07-29Assigned to "Smartisan Technology Co., Ltd."
archived source →
2026-07-17Assigned to "Smartisan Technology Co., Ltd."

Nearby in the registry

The prefixes assigned immediately before and after B4:0B:44:

FAQ

Which company owns MAC address prefix B4:0B:44?: MAC address prefix B4:0B:44 is registered to Smartisan Technology Co., Ltd. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with B4:0B:44 has a network interface built by Smartisan Technology Co., Ltd..
What is the OUI B4:0B:44?: B4:0B:44 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Smartisan Technology Co., Ltd.. It covers every address from B4:0B:44:00:00:00 to B4:0B:44:FF:FF:FF, or 16,777,216 addresses in total. It is also written B4-0B-44.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in B4:0B:44:00:00:00 that is B4:0B:44 — 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 Smartisan Technology Co., Ltd. located?: Smartisan Technology Co., Ltd. is listed at 7/F, Motorola Bldg., 1st Wangjing East Rd, Beijing CN 100102 in the IEEE OUI registry entry for B4:0B:44. This is the address the organization registered with the IEEE, which may differ from its current operating address.