Which company owns MAC address prefix FC:6D:D1?

MAC address prefix FC:6D:D1 is registered to APRESIA Systems, Ltd. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with FC:6D:D1 has a network interface built by APRESIA Systems, Ltd..

What is the OUI FC:6D:D1?

FC:6D:D1 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to APRESIA Systems, Ltd.. It covers every address from FC:6D:D1:00:00:00 to FC:6D:D1:FF:FF:FF, or 16,777,216 addresses in total. It is also written FC-6D-D1.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in FC:6D:D1:00:00:00 that is FC:6D:D1 — 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 APRESIA Systems, Ltd. located?

APRESIA Systems, Ltd. is listed at Tsukuba Network Technical Center, Kidamari 3550 Tsuchiura-shi Ibaraki-ken JP 300-0026 in the IEEE OUI registry entry for FC:6D:D1. This is the address the organization registered with the IEEE, which may differ from its current operating address.

APRESIA Systems, Ltd.

MAC address prefix FC:6D:D1 is registered to APRESIA Systems, Ltd. in the IEEE OUI registry. Any device whose MAC address begins with FC:6D:D1 has a network interface built by APRESIA Systems, 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 FC:6D:D1:00:00:00 to FC:6D:D1:FF:FF:FF.

OUI prefix: FC:6D:D1
Hyphen form: FC-6D-D1
MAC range: FC:6D:D1:00:00:00 – FC:6D:D1:FF:FF:FF
Addresses in block: 16,777,216
Organization: APRESIA Systems, Ltd.
Address: Tsukuba Network Technical Center, Kidamari 3550 Tsuchiura-shi Ibaraki-ken JP 300-0026
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.

2020-08-05Assigned to "APRESIA Systems, Ltd."
archived source →
2026-07-17Assigned to "APRESIA Systems, Ltd."

Nearby in the registry

The prefixes assigned immediately before and after FC:6D:D1:

FAQ

Which company owns MAC address prefix FC:6D:D1?: MAC address prefix FC:6D:D1 is registered to APRESIA Systems, Ltd. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with FC:6D:D1 has a network interface built by APRESIA Systems, Ltd..
What is the OUI FC:6D:D1?: FC:6D:D1 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to APRESIA Systems, Ltd.. It covers every address from FC:6D:D1:00:00:00 to FC:6D:D1:FF:FF:FF, or 16,777,216 addresses in total. It is also written FC-6D-D1.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in FC:6D:D1:00:00:00 that is FC:6D:D1 — 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 APRESIA Systems, Ltd. located?: APRESIA Systems, Ltd. is listed at Tsukuba Network Technical Center, Kidamari 3550 Tsuchiura-shi Ibaraki-ken JP 300-0026 in the IEEE OUI registry entry for FC:6D:D1. This is the address the organization registered with the IEEE, which may differ from its current operating address.