Which company owns MAC address prefix F8:20:55?

MAC address prefix F8:20:55 is registered to Green Information System in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with F8:20:55 has a network interface built by Green Information System.

What is the OUI F8:20:55?

F8:20:55 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Green Information System. It covers every address from F8:20:55:00:00:00 to F8:20:55:FF:FF:FF, or 16,777,216 addresses in total. It is also written F8-20-55.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in F8:20:55:00:00:00 that is F8:20:55 — 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 Green Information System located?

Green Information System is listed at #202(Shopping center), Woldong-ro 28, Buk-gu Gwangju KR 61153 in the IEEE OUI registry entry for F8:20:55. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Green Information System

MAC address prefix F8:20:55 is registered to Green Information System in the IEEE OUI registry. Any device whose MAC address begins with F8:20:55 has a network interface built by Green Information System. 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 F8:20:55:00:00:00 to F8:20:55:FF:FF:FF.

OUI prefix: F8:20:55
Hyphen form: F8-20-55
MAC range: F8:20:55:00:00:00 – F8:20:55:FF:FF:FF
Addresses in block: 16,777,216
Organization: Green Information System
Address: #202(Shopping center), Woldong-ro 28, Buk-gu Gwangju KR 61153
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.

2017-09-08Assigned to "Green Information System"
archived source →
2026-07-17Assigned to "Green Information System"

Nearby in the registry

The prefixes assigned immediately before and after F8:20:55:

FAQ

Which company owns MAC address prefix F8:20:55?: MAC address prefix F8:20:55 is registered to Green Information System in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with F8:20:55 has a network interface built by Green Information System.
What is the OUI F8:20:55?: F8:20:55 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Green Information System. It covers every address from F8:20:55:00:00:00 to F8:20:55:FF:FF:FF, or 16,777,216 addresses in total. It is also written F8-20-55.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in F8:20:55:00:00:00 that is F8:20:55 — 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 Green Information System located?: Green Information System is listed at #202(Shopping center), Woldong-ro 28, Buk-gu Gwangju KR 61153 in the IEEE OUI registry entry for F8:20:55. This is the address the organization registered with the IEEE, which may differ from its current operating address.