Which company owns MAC address prefix F4:4D:AD?

MAC address prefix F4:4D:AD is registered to Cable Matters Inc. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with F4:4D:AD has a network interface built by Cable Matters Inc..

What is the OUI F4:4D:AD?

F4:4D:AD is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Cable Matters Inc.. It covers every address from F4:4D:AD:00:00:00 to F4:4D:AD:FF:FF:FF, or 16,777,216 addresses in total. It is also written F4-4D-AD.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in F4:4D:AD:00:00:00 that is F4:4D:AD — 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 Cable Matters Inc. located?

Cable Matters Inc. is listed at 153 Northboro Road, Suite 5 Southborough MA US 01772 in the IEEE OUI registry entry for F4:4D:AD. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Cable Matters Inc.

MAC address prefix F4:4D:AD is registered to Cable Matters Inc. in the IEEE OUI registry. Any device whose MAC address begins with F4:4D:AD has a network interface built by Cable Matters 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 F4:4D:AD:00:00:00 to F4:4D:AD:FF:FF:FF.

OUI prefix: F4:4D:AD
Hyphen form: F4-4D-AD
MAC range: F4:4D:AD:00:00:00 – F4:4D:AD:FF:FF:FF
Addresses in block: 16,777,216
Organization: Cable Matters Inc.
Address: 153 Northboro Road, Suite 5 Southborough MA US 01772
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 (1)

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

2026-07-17Assigned to "Cable Matters Inc."

Nearby in the registry

The prefixes assigned immediately before and after F4:4D:AD:

FAQ

Which company owns MAC address prefix F4:4D:AD?: MAC address prefix F4:4D:AD is registered to Cable Matters Inc. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with F4:4D:AD has a network interface built by Cable Matters Inc..
What is the OUI F4:4D:AD?: F4:4D:AD is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Cable Matters Inc.. It covers every address from F4:4D:AD:00:00:00 to F4:4D:AD:FF:FF:FF, or 16,777,216 addresses in total. It is also written F4-4D-AD.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in F4:4D:AD:00:00:00 that is F4:4D:AD — 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 Cable Matters Inc. located?: Cable Matters Inc. is listed at 153 Northboro Road, Suite 5 Southborough MA US 01772 in the IEEE OUI registry entry for F4:4D:AD. This is the address the organization registered with the IEEE, which may differ from its current operating address.