Which company owns MAC address prefix 58:1D:C9?

MAC address prefix 58:1D:C9 is registered to MSE CO.,LTD. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 58:1D:C9 has a network interface built by MSE CO.,LTD..

What is the OUI 58:1D:C9?

58:1D:C9 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to MSE CO.,LTD.. It covers every address from 58:1D:C9:00:00:00 to 58:1D:C9:FF:FF:FF, or 16,777,216 addresses in total. It is also written 58-1D-C9.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 58:1D:C9:00:00:00 that is 58:1D:C9 — 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 MSE CO.,LTD. located?

MSE CO.,LTD. is listed at 3-1-6, Kyutaromachi, Chuo-ku, OSAKA OSAKA JP 5410056 in the IEEE OUI registry entry for 58:1D:C9. This is the address the organization registered with the IEEE, which may differ from its current operating address.

MSE CO.,LTD.

MAC address prefix 58:1D:C9 is registered to MSE CO.,LTD. in the IEEE OUI registry. Any device whose MAC address begins with 58:1D:C9 has a network interface built by MSE 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 58:1D:C9:00:00:00 to 58:1D:C9:FF:FF:FF.

OUI prefix: 58:1D:C9
Hyphen form: 58-1D-C9
MAC range: 58:1D:C9:00:00:00 – 58:1D:C9:FF:FF:FF
Addresses in block: 16,777,216
Organization: MSE CO.,LTD.
Address: 3-1-6, Kyutaromachi, Chuo-ku, OSAKA OSAKA JP 5410056
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.

2024-02-15Assigned to "MSE CO.,LTD."
archived source →
2026-07-17Assigned to "MSE CO.,LTD."

Nearby in the registry

The prefixes assigned immediately before and after 58:1D:C9:

FAQ

Which company owns MAC address prefix 58:1D:C9?: MAC address prefix 58:1D:C9 is registered to MSE CO.,LTD. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 58:1D:C9 has a network interface built by MSE CO.,LTD..
What is the OUI 58:1D:C9?: 58:1D:C9 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to MSE CO.,LTD.. It covers every address from 58:1D:C9:00:00:00 to 58:1D:C9:FF:FF:FF, or 16,777,216 addresses in total. It is also written 58-1D-C9.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 58:1D:C9:00:00:00 that is 58:1D:C9 — 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 MSE CO.,LTD. located?: MSE CO.,LTD. is listed at 3-1-6, Kyutaromachi, Chuo-ku, OSAKA OSAKA JP 5410056 in the IEEE OUI registry entry for 58:1D:C9. This is the address the organization registered with the IEEE, which may differ from its current operating address.