Which company owns MAC address prefix 64:4F:42?

MAC address prefix 64:4F:42 is registered to JETTER CO., Ltd. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 64:4F:42 has a network interface built by JETTER CO., Ltd..

What is the OUI 64:4F:42?

64:4F:42 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to JETTER CO., Ltd.. It covers every address from 64:4F:42:00:00:00 to 64:4F:42:FF:FF:FF, or 16,777,216 addresses in total. It is also written 64-4F-42.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 64:4F:42:00:00:00 that is 64:4F:42 — 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 JETTER CO., Ltd. located?

JETTER CO., Ltd. is listed at 265-40 Emukaecho Tanomoto Sasebo-shi Nagasaki JP 859-6134 in the IEEE OUI registry entry for 64:4F:42. This is the address the organization registered with the IEEE, which may differ from its current operating address.

JETTER CO., Ltd.

MAC address prefix 64:4F:42 is registered to JETTER CO., Ltd. in the IEEE OUI registry. Any device whose MAC address begins with 64:4F:42 has a network interface built by JETTER 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 64:4F:42:00:00:00 to 64:4F:42:FF:FF:FF.

OUI prefix: 64:4F:42
Hyphen form: 64-4F-42
MAC range: 64:4F:42:00:00:00 – 64:4F:42:FF:FF:FF
Addresses in block: 16,777,216
Organization: JETTER CO., Ltd.
Address: 265-40 Emukaecho Tanomoto Sasebo-shi Nagasaki JP 859-6134
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.

2018-12-21Assigned to "JETTER CO., Ltd."
archived source →
2026-07-17Assigned to "JETTER CO., Ltd."

Nearby in the registry

The prefixes assigned immediately before and after 64:4F:42:

FAQ

Which company owns MAC address prefix 64:4F:42?: MAC address prefix 64:4F:42 is registered to JETTER CO., Ltd. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 64:4F:42 has a network interface built by JETTER CO., Ltd..
What is the OUI 64:4F:42?: 64:4F:42 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to JETTER CO., Ltd.. It covers every address from 64:4F:42:00:00:00 to 64:4F:42:FF:FF:FF, or 16,777,216 addresses in total. It is also written 64-4F-42.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 64:4F:42:00:00:00 that is 64:4F:42 — 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 JETTER CO., Ltd. located?: JETTER CO., Ltd. is listed at 265-40 Emukaecho Tanomoto Sasebo-shi Nagasaki JP 859-6134 in the IEEE OUI registry entry for 64:4F:42. This is the address the organization registered with the IEEE, which may differ from its current operating address.