Which company owns MAC address prefix 98:9D:40?

MAC address prefix 98:9D:40 is registered to MIWA LOCK CO.,LTD. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 98:9D:40 has a network interface built by MIWA LOCK CO.,LTD..

What is the OUI 98:9D:40?

98:9D:40 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to MIWA LOCK CO.,LTD.. It covers every address from 98:9D:40:00:00:00 to 98:9D:40:FF:FF:FF, or 16,777,216 addresses in total. It is also written 98-9D-40.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 98:9D:40:00:00:00 that is 98:9D:40 — 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 MIWA LOCK CO.,LTD. located?

MIWA LOCK CO.,LTD. is listed at 1028-1,Yamagami Tamaki-tyou Mie JP 519-0436 in the IEEE OUI registry entry for 98:9D:40. This is the address the organization registered with the IEEE, which may differ from its current operating address.

MIWA LOCK CO.,LTD.

MAC address prefix 98:9D:40 is registered to MIWA LOCK CO.,LTD. in the IEEE OUI registry. Any device whose MAC address begins with 98:9D:40 has a network interface built by MIWA LOCK 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 98:9D:40:00:00:00 to 98:9D:40:FF:FF:FF.

OUI prefix: 98:9D:40
Hyphen form: 98-9D-40
MAC range: 98:9D:40:00:00:00 – 98:9D:40:FF:FF:FF
Addresses in block: 16,777,216
Organization: MIWA LOCK CO.,LTD.
Address: 1028-1,Yamagami Tamaki-tyou Mie JP 519-0436
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.

2025-08-23Assigned to "MIWA LOCK CO.,LTD."
archived source →
2026-07-17Assigned to "MIWA LOCK CO.,LTD."

Nearby in the registry

The prefixes assigned immediately before and after 98:9D:40:

FAQ

Which company owns MAC address prefix 98:9D:40?: MAC address prefix 98:9D:40 is registered to MIWA LOCK CO.,LTD. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 98:9D:40 has a network interface built by MIWA LOCK CO.,LTD..
What is the OUI 98:9D:40?: 98:9D:40 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to MIWA LOCK CO.,LTD.. It covers every address from 98:9D:40:00:00:00 to 98:9D:40:FF:FF:FF, or 16,777,216 addresses in total. It is also written 98-9D-40.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 98:9D:40:00:00:00 that is 98:9D:40 — 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 MIWA LOCK CO.,LTD. located?: MIWA LOCK CO.,LTD. is listed at 1028-1,Yamagami Tamaki-tyou Mie JP 519-0436 in the IEEE OUI registry entry for 98:9D:40. This is the address the organization registered with the IEEE, which may differ from its current operating address.