Which company owns MAC address prefix EC:B5:41?

MAC address prefix EC:B5:41 is registered to SHINANO E and E Co.Ltd. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with EC:B5:41 has a network interface built by SHINANO E and E Co.Ltd..

What is the OUI EC:B5:41?

EC:B5:41 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to SHINANO E and E Co.Ltd.. It covers every address from EC:B5:41:00:00:00 to EC:B5:41:FF:FF:FF, or 16,777,216 addresses in total. It is also written EC-B5-41.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in EC:B5:41:00:00:00 that is EC:B5:41 — 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 SHINANO E and E Co.Ltd. located?

SHINANO E and E Co.Ltd. is listed at 5511-6 Wada Matsumoto City Nagano JP 390-1242 in the IEEE OUI registry entry for EC:B5:41. This is the address the organization registered with the IEEE, which may differ from its current operating address.

SHINANO E and E Co.Ltd.

MAC address prefix EC:B5:41 is registered to SHINANO E and E Co.Ltd. in the IEEE OUI registry. Any device whose MAC address begins with EC:B5:41 has a network interface built by SHINANO E and E 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 EC:B5:41:00:00:00 to EC:B5:41:FF:FF:FF.

OUI prefix: EC:B5:41
Hyphen form: EC-B5-41
MAC range: EC:B5:41:00:00:00 – EC:B5:41:FF:FF:FF
Addresses in block: 16,777,216
Organization: SHINANO E and E Co.Ltd.
Address: 5511-6 Wada Matsumoto City Nagano JP 390-1242
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 "SHINANO E and E Co.Ltd."
archived source →
2026-07-17Assigned to "SHINANO E and E Co.Ltd."

Nearby in the registry

The prefixes assigned immediately before and after EC:B5:41:

FAQ

Which company owns MAC address prefix EC:B5:41?: MAC address prefix EC:B5:41 is registered to SHINANO E and E Co.Ltd. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with EC:B5:41 has a network interface built by SHINANO E and E Co.Ltd..
What is the OUI EC:B5:41?: EC:B5:41 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to SHINANO E and E Co.Ltd.. It covers every address from EC:B5:41:00:00:00 to EC:B5:41:FF:FF:FF, or 16,777,216 addresses in total. It is also written EC-B5-41.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in EC:B5:41:00:00:00 that is EC:B5:41 — 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 SHINANO E and E Co.Ltd. located?: SHINANO E and E Co.Ltd. is listed at 5511-6 Wada Matsumoto City Nagano JP 390-1242 in the IEEE OUI registry entry for EC:B5:41. This is the address the organization registered with the IEEE, which may differ from its current operating address.