Which company owns MAC address prefix 20:FE:CD?

MAC address prefix 20:FE:CD is registered to System In Frontier Inc. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 20:FE:CD has a network interface built by System In Frontier Inc..

What is the OUI 20:FE:CD?

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

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 20:FE:CD:00:00:00 that is 20:FE:CD — 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 System In Frontier Inc. located?

System In Frontier Inc. is listed at 4F Shinsuzuharu Bldg. 2-8-3 Akebonocyo Tachikawa-shi Tokyo JP 190-0012 in the IEEE OUI registry entry for 20:FE:CD. This is the address the organization registered with the IEEE, which may differ from its current operating address.

System In Frontier Inc.

MAC address prefix 20:FE:CD is registered to System In Frontier Inc. in the IEEE OUI registry. Any device whose MAC address begins with 20:FE:CD has a network interface built by System In Frontier Inc.. 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 20:FE:CD:00:00:00 to 20:FE:CD:FF:FF:FF.

OUI prefix: 20:FE:CD
Hyphen form: 20-FE-CD
MAC range: 20:FE:CD:00:00:00 – 20:FE:CD:FF:FF:FF
Addresses in block: 16,777,216
Organization: System In Frontier Inc.
Address: 4F Shinsuzuharu Bldg. 2-8-3 Akebonocyo Tachikawa-shi Tokyo JP 190-0012
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 "System In Frontier Inc."
archived source →
2026-07-17Assigned to "System In Frontier Inc."

Nearby in the registry

The prefixes assigned immediately before and after 20:FE:CD:

FAQ

Which company owns MAC address prefix 20:FE:CD?: MAC address prefix 20:FE:CD is registered to System In Frontier Inc. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 20:FE:CD has a network interface built by System In Frontier Inc..
What is the OUI 20:FE:CD?: 20:FE:CD is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to System In Frontier Inc.. It covers every address from 20:FE:CD:00:00:00 to 20:FE:CD:FF:FF:FF, or 16,777,216 addresses in total. It is also written 20-FE-CD.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 20:FE:CD:00:00:00 that is 20:FE:CD — 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 System In Frontier Inc. located?: System In Frontier Inc. is listed at 4F Shinsuzuharu Bldg. 2-8-3 Akebonocyo Tachikawa-shi Tokyo JP 190-0012 in the IEEE OUI registry entry for 20:FE:CD. This is the address the organization registered with the IEEE, which may differ from its current operating address.