Which company owns MAC address prefix C4:FC:EF?

MAC address prefix C4:FC:EF is registered to SambaNova Systems, Inc. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with C4:FC:EF has a network interface built by SambaNova Systems, Inc..

What is the OUI C4:FC:EF?

C4:FC:EF is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to SambaNova Systems, Inc.. It covers every address from C4:FC:EF:00:00:00 to C4:FC:EF:FF:FF:FF, or 16,777,216 addresses in total. It is also written C4-FC-EF.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in C4:FC:EF:00:00:00 that is C4:FC:EF — 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 SambaNova Systems, Inc. located?

SambaNova Systems, Inc. is listed at 2100 Geng Rd #103 Palo Alto US 94303 in the IEEE OUI registry entry for C4:FC:EF. This is the address the organization registered with the IEEE, which may differ from its current operating address.

SambaNova Systems, Inc.

MAC address prefix C4:FC:EF is registered to SambaNova Systems, Inc. in the IEEE OUI registry. Any device whose MAC address begins with C4:FC:EF has a network interface built by SambaNova Systems, 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 C4:FC:EF:00:00:00 to C4:FC:EF:FF:FF:FF.

OUI prefix: C4:FC:EF
Hyphen form: C4-FC-EF
MAC range: C4:FC:EF:00:00:00 – C4:FC:EF:FF:FF:FF
Addresses in block: 16,777,216
Organization: SambaNova Systems, Inc.
Address: 2100 Geng Rd #103 Palo Alto US 94303
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.

2022-07-11Assigned to "SambaNova Systems, Inc."
archived source →
2026-07-17Assigned to "SambaNova Systems, Inc."

Nearby in the registry

The prefixes assigned immediately before and after C4:FC:EF:

FAQ

Which company owns MAC address prefix C4:FC:EF?: MAC address prefix C4:FC:EF is registered to SambaNova Systems, Inc. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with C4:FC:EF has a network interface built by SambaNova Systems, Inc..
What is the OUI C4:FC:EF?: C4:FC:EF is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to SambaNova Systems, Inc.. It covers every address from C4:FC:EF:00:00:00 to C4:FC:EF:FF:FF:FF, or 16,777,216 addresses in total. It is also written C4-FC-EF.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in C4:FC:EF:00:00:00 that is C4:FC:EF — 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 SambaNova Systems, Inc. located?: SambaNova Systems, Inc. is listed at 2100 Geng Rd #103 Palo Alto US 94303 in the IEEE OUI registry entry for C4:FC:EF. This is the address the organization registered with the IEEE, which may differ from its current operating address.