Which company owns MAC address prefix F8:FE:5C?

MAC address prefix F8:FE:5C is registered to Reciprocal Labs Corp in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with F8:FE:5C has a network interface built by Reciprocal Labs Corp.

What is the OUI F8:FE:5C?

F8:FE:5C is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Reciprocal Labs Corp. It covers every address from F8:FE:5C:00:00:00 to F8:FE:5C:FF:FF:FF, or 16,777,216 addresses in total. It is also written F8-FE-5C.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in F8:FE:5C:00:00:00 that is F8:FE:5C — 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 Reciprocal Labs Corp located?

Reciprocal Labs Corp is listed at 3 S. Pinckney St. Madison WI US 53703 in the IEEE OUI registry entry for F8:FE:5C. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Reciprocal Labs Corp

MAC address prefix F8:FE:5C is registered to Reciprocal Labs Corp in the IEEE OUI registry. Any device whose MAC address begins with F8:FE:5C has a network interface built by Reciprocal Labs Corp. 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:FE:5C:00:00:00 to F8:FE:5C:FF:FF:FF.

OUI prefix: F8:FE:5C
Hyphen form: F8-FE-5C
MAC range: F8:FE:5C:00:00:00 – F8:FE:5C:FF:FF:FF
Addresses in block: 16,777,216
Organization: Reciprocal Labs Corp
Address: 3 S. Pinckney St. Madison WI US 53703
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 "Reciprocal Labs Corp"
archived source →
2026-07-17Assigned to "Reciprocal Labs Corp"

Nearby in the registry

The prefixes assigned immediately before and after F8:FE:5C:

FAQ

Which company owns MAC address prefix F8:FE:5C?: MAC address prefix F8:FE:5C is registered to Reciprocal Labs Corp in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with F8:FE:5C has a network interface built by Reciprocal Labs Corp.
What is the OUI F8:FE:5C?: F8:FE:5C is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Reciprocal Labs Corp. It covers every address from F8:FE:5C:00:00:00 to F8:FE:5C:FF:FF:FF, or 16,777,216 addresses in total. It is also written F8-FE-5C.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in F8:FE:5C:00:00:00 that is F8:FE:5C — 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 Reciprocal Labs Corp located?: Reciprocal Labs Corp is listed at 3 S. Pinckney St. Madison WI US 53703 in the IEEE OUI registry entry for F8:FE:5C. This is the address the organization registered with the IEEE, which may differ from its current operating address.