Which company owns MAC address prefix B0:49:5F?

MAC address prefix B0:49:5F is registered to OMRON HEALTHCARE Co., Ltd. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with B0:49:5F has a network interface built by OMRON HEALTHCARE Co., Ltd..

What is the OUI B0:49:5F?

B0:49:5F is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to OMRON HEALTHCARE Co., Ltd.. It covers every address from B0:49:5F:00:00:00 to B0:49:5F:FF:FF:FF, or 16,777,216 addresses in total. It is also written B0-49-5F.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in B0:49:5F:00:00:00 that is B0:49:5F — 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 OMRON HEALTHCARE Co., Ltd. located?

OMRON HEALTHCARE Co., Ltd. is listed at 53, Kunotsubo, Terado-cho Muko Kyoto JP 6170002 in the IEEE OUI registry entry for B0:49:5F. This is the address the organization registered with the IEEE, which may differ from its current operating address.

OMRON HEALTHCARE Co., Ltd.

MAC address prefix B0:49:5F is registered to OMRON HEALTHCARE Co., Ltd. in the IEEE OUI registry. Any device whose MAC address begins with B0:49:5F has a network interface built by OMRON HEALTHCARE 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 B0:49:5F:00:00:00 to B0:49:5F:FF:FF:FF.

OUI prefix: B0:49:5F
Hyphen form: B0-49-5F
MAC range: B0:49:5F:00:00:00 – B0:49:5F:FF:FF:FF
Addresses in block: 16,777,216
Organization: OMRON HEALTHCARE Co., Ltd.
Address: 53, Kunotsubo, Terado-cho Muko Kyoto JP 6170002
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 "OMRON HEALTHCARE Co., Ltd."
archived source →
2026-07-17Assigned to "OMRON HEALTHCARE Co., Ltd."

Nearby in the registry

The prefixes assigned immediately before and after B0:49:5F:

FAQ

Which company owns MAC address prefix B0:49:5F?: MAC address prefix B0:49:5F is registered to OMRON HEALTHCARE Co., Ltd. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with B0:49:5F has a network interface built by OMRON HEALTHCARE Co., Ltd..
What is the OUI B0:49:5F?: B0:49:5F is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to OMRON HEALTHCARE Co., Ltd.. It covers every address from B0:49:5F:00:00:00 to B0:49:5F:FF:FF:FF, or 16,777,216 addresses in total. It is also written B0-49-5F.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in B0:49:5F:00:00:00 that is B0:49:5F — 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 OMRON HEALTHCARE Co., Ltd. located?: OMRON HEALTHCARE Co., Ltd. is listed at 53, Kunotsubo, Terado-cho Muko Kyoto JP 6170002 in the IEEE OUI registry entry for B0:49:5F. This is the address the organization registered with the IEEE, which may differ from its current operating address.