Which company owns MAC address prefix 58:F6:BF?

MAC address prefix 58:F6:BF is registered to Kyoto University in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 58:F6:BF has a network interface built by Kyoto University.

What is the OUI 58:F6:BF?

58:F6:BF is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Kyoto University. It covers every address from 58:F6:BF:00:00:00 to 58:F6:BF:FF:FF:FF, or 16,777,216 addresses in total. It is also written 58-F6-BF.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 58:F6:BF:00:00:00 that is 58:F6:BF — 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 Kyoto University located?

Kyoto University is listed at Yoshida-Hommachi Kyoto JP 6068501 in the IEEE OUI registry entry for 58:F6:BF. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Kyoto University

MAC address prefix 58:F6:BF is registered to Kyoto University in the IEEE OUI registry. Any device whose MAC address begins with 58:F6:BF has a network interface built by Kyoto University. 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 58:F6:BF:00:00:00 to 58:F6:BF:FF:FF:FF.

OUI prefix: 58:F6:BF
Hyphen form: 58-F6-BF
MAC range: 58:F6:BF:00:00:00 – 58:F6:BF:FF:FF:FF
Addresses in block: 16,777,216
Organization: Kyoto University
Address: Yoshida-Hommachi Kyoto JP 6068501
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 "Kyoto University"
archived source →
2026-07-17Assigned to "Kyoto University"

Nearby in the registry

The prefixes assigned immediately before and after 58:F6:BF:

FAQ

Which company owns MAC address prefix 58:F6:BF?: MAC address prefix 58:F6:BF is registered to Kyoto University in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 58:F6:BF has a network interface built by Kyoto University.
What is the OUI 58:F6:BF?: 58:F6:BF is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Kyoto University. It covers every address from 58:F6:BF:00:00:00 to 58:F6:BF:FF:FF:FF, or 16,777,216 addresses in total. It is also written 58-F6-BF.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 58:F6:BF:00:00:00 that is 58:F6:BF — 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 Kyoto University located?: Kyoto University is listed at Yoshida-Hommachi Kyoto JP 6068501 in the IEEE OUI registry entry for 58:F6:BF. This is the address the organization registered with the IEEE, which may differ from its current operating address.