Which company owns MAC address prefix AC:F4:73?

MAC address prefix AC:F4:73 is registered to iRobot Corporation in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with AC:F4:73 has a network interface built by iRobot Corporation.

What is the OUI AC:F4:73?

AC:F4:73 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to iRobot Corporation. It covers every address from AC:F4:73:00:00:00 to AC:F4:73:FF:FF:FF, or 16,777,216 addresses in total. It is also written AC-F4-73.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in AC:F4:73:00:00:00 that is AC:F4:73 — 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 iRobot Corporation located?

iRobot Corporation is listed at 8 Crosby Drive Bedford MA US 01730 in the IEEE OUI registry entry for AC:F4:73. This is the address the organization registered with the IEEE, which may differ from its current operating address.

How many MAC prefixes does iRobot Corporation own?

iRobot Corporation holds 3 OUI prefixes in the IEEE registry, of which AC:F4:73 is one. A device made by iRobot Corporation could carry a MAC address from any of them.

iRobot Corporation

MAC address prefix AC:F4:73 is registered to iRobot Corporation in the IEEE OUI registry. Any device whose MAC address begins with AC:F4:73 has a network interface built by iRobot Corporation. 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 AC:F4:73:00:00:00 to AC:F4:73:FF:FF:FF.

OUI prefix: AC:F4:73
Hyphen form: AC-F4-73
MAC range: AC:F4:73:00:00:00 – AC:F4:73:FF:FF:FF
Addresses in block: 16,777,216
Organization: iRobot Corporation
Address: 8 Crosby Drive Bedford MA US 01730
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 iRobot Corporation

iRobot Corporation holds 3 OUI prefixes in total. A device with this exact prefix could just as well carry any of these:

Assignment history (2)

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

2024-11-20Assigned to "iRobot Corporation"
archived source →
2026-07-17Assigned to "iRobot Corporation"

Nearby in the registry

The prefixes assigned immediately before and after AC:F4:73:

FAQ

Which company owns MAC address prefix AC:F4:73?: MAC address prefix AC:F4:73 is registered to iRobot Corporation in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with AC:F4:73 has a network interface built by iRobot Corporation.
What is the OUI AC:F4:73?: AC:F4:73 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to iRobot Corporation. It covers every address from AC:F4:73:00:00:00 to AC:F4:73:FF:FF:FF, or 16,777,216 addresses in total. It is also written AC-F4-73.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in AC:F4:73:00:00:00 that is AC:F4:73 — 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 iRobot Corporation located?: iRobot Corporation is listed at 8 Crosby Drive Bedford MA US 01730 in the IEEE OUI registry entry for AC:F4:73. This is the address the organization registered with the IEEE, which may differ from its current operating address.
How many MAC prefixes does iRobot Corporation own?: iRobot Corporation holds 3 OUI prefixes in the IEEE registry, of which AC:F4:73 is one. A device made by iRobot Corporation could carry a MAC address from any of them.