Which company owns MAC address prefix 00:0B:A1?

MAC address prefix 00:0B:A1 is registered to Fujikura Solutions Ltd. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 00:0B:A1 has a network interface built by Fujikura Solutions Ltd..

What is the OUI 00:0B:A1?

00:0B:A1 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Fujikura Solutions Ltd.. It covers every address from 00:0B:A1:00:00:00 to 00:0B:A1:FF:FF:FF, or 16,777,216 addresses in total. It is also written 00-0B-A1.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 00:0B:A1:00:00:00 that is 00:0B:A1 — 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 Fujikura Solutions Ltd. located?

Fujikura Solutions Ltd. is listed at 1565-6,Shirakusadai,Fukaya-shi Saitama-ken JP 369-1106 in the IEEE OUI registry entry for 00:0B:A1. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Fujikura Solutions Ltd.

MAC address prefix 00:0B:A1 is registered to Fujikura Solutions Ltd. in the IEEE OUI registry. Any device whose MAC address begins with 00:0B:A1 has a network interface built by Fujikura Solutions 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 00:0B:A1:00:00:00 to 00:0B:A1:FF:FF:FF.

OUI prefix: 00:0B:A1
Hyphen form: 00-0B-A1
MAC range: 00:0B:A1:00:00:00 – 00:0B:A1:FF:FF:FF
Addresses in block: 16,777,216
Organization: Fujikura Solutions Ltd.
Address: 1565-6,Shirakusadai,Fukaya-shi Saitama-ken JP 369-1106
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 (3)

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 "SYSCOM Ltd."
archived source →
2017-09-08Renamed from "SYSCOM Ltd." to "Fujikura Solutions Ltd."
archived source →
2026-07-17Assigned to "Fujikura Solutions Ltd."

Nearby in the registry

The prefixes assigned immediately before and after 00:0B:A1:

FAQ

Which company owns MAC address prefix 00:0B:A1?: MAC address prefix 00:0B:A1 is registered to Fujikura Solutions Ltd. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 00:0B:A1 has a network interface built by Fujikura Solutions Ltd..
What is the OUI 00:0B:A1?: 00:0B:A1 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Fujikura Solutions Ltd.. It covers every address from 00:0B:A1:00:00:00 to 00:0B:A1:FF:FF:FF, or 16,777,216 addresses in total. It is also written 00-0B-A1.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 00:0B:A1:00:00:00 that is 00:0B:A1 — 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 Fujikura Solutions Ltd. located?: Fujikura Solutions Ltd. is listed at 1565-6,Shirakusadai,Fukaya-shi Saitama-ken JP 369-1106 in the IEEE OUI registry entry for 00:0B:A1. This is the address the organization registered with the IEEE, which may differ from its current operating address.