Which company owns MAC address prefix F0:AE:51?

MAC address prefix F0:AE:51 is registered to Xi3 Corp in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with F0:AE:51 has a network interface built by Xi3 Corp.

What is the OUI F0:AE:51?

F0:AE:51 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Xi3 Corp. It covers every address from F0:AE:51:00:00:00 to F0:AE:51:FF:FF:FF, or 16,777,216 addresses in total. It is also written F0-AE-51.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in F0:AE:51:00:00:00 that is F0:AE:51 — 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 Xi3 Corp located?

Xi3 Corp is listed at 299 S. Main St. Salt Lake City UT US 84111 in the IEEE OUI registry entry for F0:AE:51. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Xi3 Corp

MAC address prefix F0:AE:51 is registered to Xi3 Corp in the IEEE OUI registry. Any device whose MAC address begins with F0:AE:51 has a network interface built by Xi3 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 F0:AE:51:00:00:00 to F0:AE:51:FF:FF:FF.

OUI prefix: F0:AE:51
Hyphen form: F0-AE-51
MAC range: F0:AE:51:00:00:00 – F0:AE:51:FF:FF:FF
Addresses in block: 16,777,216
Organization: Xi3 Corp
Address: 299 S. Main St. Salt Lake City UT US 84111
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 "Xi3 Corp"
archived source →
2026-07-17Assigned to "Xi3 Corp"

Nearby in the registry

The prefixes assigned immediately before and after F0:AE:51:

FAQ

Which company owns MAC address prefix F0:AE:51?: MAC address prefix F0:AE:51 is registered to Xi3 Corp in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with F0:AE:51 has a network interface built by Xi3 Corp.
What is the OUI F0:AE:51?: F0:AE:51 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Xi3 Corp. It covers every address from F0:AE:51:00:00:00 to F0:AE:51:FF:FF:FF, or 16,777,216 addresses in total. It is also written F0-AE-51.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in F0:AE:51:00:00:00 that is F0:AE:51 — 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 Xi3 Corp located?: Xi3 Corp is listed at 299 S. Main St. Salt Lake City UT US 84111 in the IEEE OUI registry entry for F0:AE:51. This is the address the organization registered with the IEEE, which may differ from its current operating address.