Which company owns MAC address prefix D8:33:7F?

MAC address prefix D8:33:7F is registered to Office FA.com Co.,Ltd. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with D8:33:7F has a network interface built by Office FA.com Co.,Ltd..

What is the OUI D8:33:7F?

D8:33:7F is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Office FA.com Co.,Ltd.. It covers every address from D8:33:7F:00:00:00 to D8:33:7F:FF:FF:FF, or 16,777,216 addresses in total. It is also written D8-33-7F.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in D8:33:7F:00:00:00 that is D8:33:7F — 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 Office FA.com Co.,Ltd. located?

Office FA.com Co.,Ltd. is listed at 293-21 Oyama-shi Tochigi JP 329-0216 in the IEEE OUI registry entry for D8:33:7F. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Office FA.com Co.,Ltd.

MAC address prefix D8:33:7F is registered to Office FA.com Co.,Ltd. in the IEEE OUI registry. Any device whose MAC address begins with D8:33:7F has a network interface built by Office FA.com 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 D8:33:7F:00:00:00 to D8:33:7F:FF:FF:FF.

OUI prefix: D8:33:7F
Hyphen form: D8-33-7F
MAC range: D8:33:7F:00:00:00 – D8:33:7F:FF:FF:FF
Addresses in block: 16,777,216
Organization: Office FA.com Co.,Ltd.
Address: 293-21 Oyama-shi Tochigi JP 329-0216
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 "Office FA.com Co.,Ltd."
archived source →
2026-07-17Assigned to "Office FA.com Co.,Ltd."

Nearby in the registry

The prefixes assigned immediately before and after D8:33:7F:

FAQ

Which company owns MAC address prefix D8:33:7F?: MAC address prefix D8:33:7F is registered to Office FA.com Co.,Ltd. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with D8:33:7F has a network interface built by Office FA.com Co.,Ltd..
What is the OUI D8:33:7F?: D8:33:7F is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Office FA.com Co.,Ltd.. It covers every address from D8:33:7F:00:00:00 to D8:33:7F:FF:FF:FF, or 16,777,216 addresses in total. It is also written D8-33-7F.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in D8:33:7F:00:00:00 that is D8:33:7F — 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 Office FA.com Co.,Ltd. located?: Office FA.com Co.,Ltd. is listed at 293-21 Oyama-shi Tochigi JP 329-0216 in the IEEE OUI registry entry for D8:33:7F. This is the address the organization registered with the IEEE, which may differ from its current operating address.