Which company owns MAC address prefix 80:79:EF?

MAC address prefix 80:79:EF is registered to SUB-ZERO GROUP, INC. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 80:79:EF has a network interface built by SUB-ZERO GROUP, INC..

What is the OUI 80:79:EF?

80:79:EF is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to SUB-ZERO GROUP, INC.. It covers every address from 80:79:EF:00:00:00 to 80:79:EF:FF:FF:FF, or 16,777,216 addresses in total. It is also written 80-79-EF.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 80:79:EF:00:00:00 that is 80:79: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 SUB-ZERO GROUP, INC. located?

SUB-ZERO GROUP, INC. is listed at 2835 Buds Drive Fitchburg WI US 53719 in the IEEE OUI registry entry for 80:79:EF. This is the address the organization registered with the IEEE, which may differ from its current operating address.

SUB-ZERO GROUP, INC.

MAC address prefix 80:79:EF is registered to SUB-ZERO GROUP, INC. in the IEEE OUI registry. Any device whose MAC address begins with 80:79:EF has a network interface built by SUB-ZERO GROUP, 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 80:79:EF:00:00:00 to 80:79:EF:FF:FF:FF.

OUI prefix: 80:79:EF
Hyphen form: 80-79-EF
MAC range: 80:79:EF:00:00:00 – 80:79:EF:FF:FF:FF
Addresses in block: 16,777,216
Organization: SUB-ZERO GROUP, INC.
Address: 2835 Buds Drive Fitchburg WI US 53719
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.

2026-02-17Assigned to "SUB-ZERO GROUP, INC."
archived source →
2026-07-17Assigned to "SUB-ZERO GROUP, INC."

Nearby in the registry

The prefixes assigned immediately before and after 80:79:EF:

FAQ

Which company owns MAC address prefix 80:79:EF?: MAC address prefix 80:79:EF is registered to SUB-ZERO GROUP, INC. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 80:79:EF has a network interface built by SUB-ZERO GROUP, INC..
What is the OUI 80:79:EF?: 80:79:EF is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to SUB-ZERO GROUP, INC.. It covers every address from 80:79:EF:00:00:00 to 80:79:EF:FF:FF:FF, or 16,777,216 addresses in total. It is also written 80-79-EF.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 80:79:EF:00:00:00 that is 80:79: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 SUB-ZERO GROUP, INC. located?: SUB-ZERO GROUP, INC. is listed at 2835 Buds Drive Fitchburg WI US 53719 in the IEEE OUI registry entry for 80:79:EF. This is the address the organization registered with the IEEE, which may differ from its current operating address.