Which company owns MAC address prefix 34:CB:1A?

MAC address prefix 34:CB:1A is registered to Procter & Gamble Company in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 34:CB:1A has a network interface built by Procter & Gamble Company.

What is the OUI 34:CB:1A?

34:CB:1A is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Procter & Gamble Company. It covers every address from 34:CB:1A:00:00:00 to 34:CB:1A:FF:FF:FF, or 16,777,216 addresses in total. It is also written 34-CB-1A.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 34:CB:1A:00:00:00 that is 34:CB:1A — 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 Procter & Gamble Company located?

Procter & Gamble Company is listed at 2 Procter & Gamble Plaza Cincinnati OH US 45202 in the IEEE OUI registry entry for 34:CB:1A. This is the address the organization registered with the IEEE, which may differ from its current operating address.

How many MAC prefixes does Procter & Gamble Company own?

Procter & Gamble Company holds 2 OUI prefixes in the IEEE registry, of which 34:CB:1A is one. A device made by Procter & Gamble Company could carry a MAC address from any of them.

Procter & Gamble Company

MAC address prefix 34:CB:1A is registered to Procter & Gamble Company in the IEEE OUI registry. Any device whose MAC address begins with 34:CB:1A has a network interface built by Procter & Gamble Company. 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 34:CB:1A:00:00:00 to 34:CB:1A:FF:FF:FF.

OUI prefix: 34:CB:1A
Hyphen form: 34-CB-1A
MAC range: 34:CB:1A:00:00:00 – 34:CB:1A:FF:FF:FF
Addresses in block: 16,777,216
Organization: Procter & Gamble Company
Address: 2 Procter & Gamble Plaza Cincinnati OH US 45202
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.

Other prefixes from Procter & Gamble Company

Procter & Gamble Company holds 2 OUI prefixes in total. A device with this exact prefix could just as well carry any of these:

AC:DC:E5

Assignment history (2)

The IEEE registry publishes current state only — this is the change record we've kept since we started tracking it daily.

2020-03-21Assigned to "Procter & Gamble Company"
archived source →
2026-07-17Assigned to "Procter & Gamble Company"

Nearby in the registry

The prefixes assigned immediately before and after 34:CB:1A:

FAQ

Which company owns MAC address prefix 34:CB:1A?: MAC address prefix 34:CB:1A is registered to Procter & Gamble Company in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 34:CB:1A has a network interface built by Procter & Gamble Company.
What is the OUI 34:CB:1A?: 34:CB:1A is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Procter & Gamble Company. It covers every address from 34:CB:1A:00:00:00 to 34:CB:1A:FF:FF:FF, or 16,777,216 addresses in total. It is also written 34-CB-1A.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 34:CB:1A:00:00:00 that is 34:CB:1A — 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 Procter & Gamble Company located?: Procter & Gamble Company is listed at 2 Procter & Gamble Plaza Cincinnati OH US 45202 in the IEEE OUI registry entry for 34:CB:1A. This is the address the organization registered with the IEEE, which may differ from its current operating address.
How many MAC prefixes does Procter & Gamble Company own?: Procter & Gamble Company holds 2 OUI prefixes in the IEEE registry, of which 34:CB:1A is one. A device made by Procter & Gamble Company could carry a MAC address from any of them.