Which company owns MAC address prefix 70:91:8F?

MAC address prefix 70:91:8F is registered to Weber-Stephen Products LLC in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 70:91:8F has a network interface built by Weber-Stephen Products LLC.

What is the OUI 70:91:8F?

70:91:8F is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Weber-Stephen Products LLC. It covers every address from 70:91:8F:00:00:00 to 70:91:8F:FF:FF:FF, or 16,777,216 addresses in total. It is also written 70-91-8F.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 70:91:8F:00:00:00 that is 70:91:8F — 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 Weber-Stephen Products LLC located?

Weber-Stephen Products LLC is listed at 1415 S. Roselle Rd Palatine IL US 60067 in the IEEE OUI registry entry for 70:91:8F. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Weber-Stephen Products LLC

MAC address prefix 70:91:8F is registered to Weber-Stephen Products LLC in the IEEE OUI registry. Any device whose MAC address begins with 70:91:8F has a network interface built by Weber-Stephen Products LLC. 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 70:91:8F:00:00:00 to 70:91:8F:FF:FF:FF.

OUI prefix: 70:91:8F
Hyphen form: 70-91-8F
MAC range: 70:91:8F:00:00:00 – 70:91:8F:FF:FF:FF
Addresses in block: 16,777,216
Organization: Weber-Stephen Products LLC
Address: 1415 S. Roselle Rd Palatine IL US 60067
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.

2017-09-08Assigned to "Weber-Stephen Products LLC"
archived source →
2026-07-17Assigned to "Weber-Stephen Products LLC"

Nearby in the registry

The prefixes assigned immediately before and after 70:91:8F:

FAQ

Which company owns MAC address prefix 70:91:8F?: MAC address prefix 70:91:8F is registered to Weber-Stephen Products LLC in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 70:91:8F has a network interface built by Weber-Stephen Products LLC.
What is the OUI 70:91:8F?: 70:91:8F is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Weber-Stephen Products LLC. It covers every address from 70:91:8F:00:00:00 to 70:91:8F:FF:FF:FF, or 16,777,216 addresses in total. It is also written 70-91-8F.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 70:91:8F:00:00:00 that is 70:91:8F — 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 Weber-Stephen Products LLC located?: Weber-Stephen Products LLC is listed at 1415 S. Roselle Rd Palatine IL US 60067 in the IEEE OUI registry entry for 70:91:8F. This is the address the organization registered with the IEEE, which may differ from its current operating address.